Year 9 Chemistry revision by Ben Sudjaitham https://padlet.com/ben_sudjaitham1/year9chemistryrevision en-us 2022-11-13 23:06:54 UTC 2025-09-25 08:07:31 UTC hello@padlet.com 1- Isotopes ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890183 Task: Watch the video and then answer the following questions. Self-mark using a purple pen.

1 . What is the name for different atoms of the same element, which have the same number of protons and a different number of neutrons?
2 . Yes or No: Are carbon-12 and carbon-14 isotopes?
3 . Yes or No: Do carbon-12 and carbon-14 isotopes have the same number of protons?
4 . Yes or No: Do carbon-12 and carbon-14 isotopes have the same number of neutrons?
5 . Which isotope has a bigger nucleus - carbon-12 or carbon-14?
6 . True or False: Chlorine-35 and chlorine-37 are not isotopes.
7 . Yes or No: Do chlorine-35 and chlorine-37 isotopes have a different number of protons?
8 . Yes or No: Do chlorine-35 and chlorine-37 isotopes have a different number of neutrons?
9 . Which isotope has more sub-atomic particles in its nucleus - chlorine-35 or chlorine-37?
10 . Which isotope has a smaller nucleus - chlorine-35 or chlorine-37?
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890183 3 - Atomic structure ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890186 Task 1: Watch the video and then answer the Questions. Self-mark using a purple pen.

1 . What is the relative mass of a proton?
2 . What is the relative mass of an electron?
3 . What is the relative mass of a neutron?
4 . What is the relative charge of a proton?
5 . What is the relative charge of an electron?
6 . What is the relative charge of a neutron?
7 . What is the central part of an atom called?
8 . Where are protons and neutrons found in an atom?
9 . Where are electrons found in an atom?
10 . What is another name for a shell?
11 . What is the overall charge of any nucleus in any atom?
12 . In an atom with no overall charge...are there an equal number of protons and electrons? Or an unequal number?
13 . Where is the mass concentrated in an atom?
14 . What is in between the electrons in an atom?
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890186 4 - Why are atoms neutral? ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890187 Task 2: Watch the video and then answer the Questions. Self-mark using a purple pen.

1 . What is the relative mass of a proton?
2 . What is the relative mass of an electron?
3 . What is the relative mass of a neutron?
4 . What is the relative charge of a proton?
5 . What is the relative charge of an electron?
6 . What is the relative charge of a neutron?
7 . What is the charge of atoms?
8 . Yes or No: Do protons and electrons cancel each other out?
9 . What is the charge if there are 9 protons and 9 electrons?
10 . What is the charge if there are 22 protons and 22 electrons?
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890187 5 - Mass number and atomic number ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890188 Task 3: Watch the video and then answer the Questions. Self-mark using a purple pen.

1 . Is the mass number always the larger number or smaller number next to the chemical symbol?
2 . Is the atomic number always the larger number or smaller number next to the chemical symbol?
3 . The number of protons in an atom is calculated using the ______ number
4 . The number of electrons in an atom is calculated using the ______ number
5 . The number of neutrons in an atom is calculated using the ____ number and atomic number
6 . The number of ______ = the mass number - atomic number
7 . Lithium has a mass number of 7 and an atomic number of 3. How many protons does lithium have?
8 . Nitrogen has a mass number of 14 and an atomic number of 7. How many electrons does nitrogen have?
9 . Potassium has a mass number of 39 and an atomic number of 19. How many neutrons does potassium have?
10 . Aluminium has a mass number of 27 and an atomic number of 13. How many protons does aluminium have?
11 . Phosphorous has a mass number of 31 and an atomic number of 15. How many electrons does phosphorous have?
12 . Phosphorous has a mass number of 31 and an atomic number of 15. How many neutrons does phosphorous have?
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890188 1 - Mixtures ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890189 Task 1: Watch the video and then answer the Questions. Self-mark using a purple pen.

1. What is the name when there are different atoms which are chemically combined?
2. Which separation technique is used to separate ink in pens?
3. What is the basic building block of all substances?
4. Which separation technique is used to separate sulfur and iron powder?
5. What is the name when there are different substances which are not chemically combined?
6. Which separation technique is used to separate crude oil?
7. Yes or No: Are the substances in a mixture chemically combined?
8. Which separation techniques are used to separate rock salt? ______ and crystallisation
9. Yes or No: Is air a mixture?
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890189 2 - Filtration ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890190 Task 2: Watch the video and then answer the Questions. Self-mark using a purple pen.

1. What is the name of the separation technique where large insoluble substances are trapped, allowing the solvent and dissolved solutes to pass through?
2. In filtration, what is the special name for the large insoluble substances trapped in the filter paper?
3. When a mixture of sand, salt and water is filtered, what is the residue?
4. In filtration, which piece of apparatus is the filter paper placed in?
5. In filtration, which piece of apparatus is responsible for trapping large insoluble substances?
6. In filtration, what is the special name for the dissolved solutes and solvent that has passed through the filter paper?
7. In filtration, which piece of apparatus holds the filter funnel?
8. In which piece of apparatus would you expect to find the residue?
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890190 Simple distillation ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890191 1. What piece of apparatus could be used to heat a round-bottomed flask?
2. In distillation, what piece of apparatus can be used to condense the gas?
3. Which liquid flows in and out of the condenser?
4. Does the water flow into the condenser from the top or bottom?
5. In degrees Celsius, what is the temperature reading on a thermometer when pure water boils?
6. True or False: The condenser stops the gas escaping by turning the gas into a liquid before it reaches the conical flask. This increases the volume collected as it turns nearly all the vapour into a liquid.
7. What is the name of the process when a gas changes into a liquid?
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890191 Answers 2: Filtration ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890192 1. filtration - if you said ''FILTERATION'' then you are wrong as this isn't a real word
2. residue
3. sand
4. filter funnel
5. filter paper - you have to be specific about which type of paper it is as ''paper'' and ''filtration paper'' are wrong
6. filtrate
7. conical flask
8. filter paper - saying ''filtration paper' is wrong as you must say ''filter paper''
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890192 Answers 3: Simple distillation ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890193 1. Bunsen burner
2. condenser
3. water
4. bottom
5. 100°C
6. true.
7. condense
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890193 History of the Periodic table ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890197 Task: Watch the video & complete the following

One of the first versions of the periodic table was put together in 18___.

Mendeleev left g_______ in his version of the periodic table because he presumed that these elements hadn’t been discovered yet.  Based on the location of that unknown element in the periodic table he could predict a lot of its properties. 


]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890197 2 - Atoms, elements and compounds ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890198 Task 2: Answer the following questions

1 . What are all substances made of?
2 . What are wood, plastic, metal and humans made of?
3 . What does an element contain the same type of?
4 . In a compound, are the atoms the same or different?
5 . What is the basic building block of all substances?
6 . What is a substance called when it is made of the same type of atoms?
7 . What is a substance called when it is made of different atoms chemically combined?
8 . Is iron an element or compound?
9 . Is chlorine gas an element or compound?
10 . Is water an element or compound?
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890198 1 - Dalton ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890208 Task 1: Watch the video and answer the following Qs. Self-mark using a purple pen.

1 . What was the name of the ancient Greek philosopher who came up with the word ''atom''?
2 . Which English Scientist published his theory in 1805 on the atom?
3 . What did Dalton say all matter is made of?
4 . What word did Dalton use to describe the size of atoms?
5 . Dalton said atoms could not be ______ down into smaller parts
6 . Dalton said atoms cannot be _____ or destroyed
7 . Dalton said atoms were identical in an _______
8 . Did Dalton say atoms are hard or soft?
9 . What shape did Dalton say atoms have?
10 . True or False: Dalton said atoms can be broken down into smaller parts
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890208 2 - Thomson's Plum pudding model ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890209 1 . Which sub-atomic particle did JJ Thomson prove the presence of?
2 . Whose atomic theory model did Thomson's evidence disprove?
3 . What was the name of Thomson's new model of the atom?
4 . Which cake did Thomson say the atom can be modelled on?
5 . What charge did the sponge in the plum pudding cake represent?
6 . What did the raisins/plums in the plum pudding cake represent?
7 . What charge did Thomson say atoms had?
8 . Dalton knew atoms had no overall charge so there must have been an ______ number of positive and negative charge
9 . Thomson's plum pudding model consists of tiny negatively charged ______ spread out in a cloud of positive charge.
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890209 3 - Rutherford's gold foil experiment ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890210 1 . Thomson's plum pudding model described the atom as having tiny negatively charged electrons spread out in a cloud of _____ charge.
2 . What dense particles did Rutherford fire at the thin gold foil?
3 . What is the exact charge of an alpha particle?
4 . What charge do the nuclei in the gold atoms have?
5 . When particles of the same charge interact with each other, they _____ each other
6 . When positive and negative particles interact with each other, they _____ each other
7 . When Rutherford fired the alpha particles at the thin gold foil, he expected the alpha particles to go _______ through
8 . True or False: In Rutherford's gold foil experiment, the majority of alpha particles were deflected straight back
9 . When Rutherford fired alpha particles at the gold foil, some alpha particles were _______ by the positive nuclei so were deflected in different directions
10 . In Rutherford's gold foil experiment, as some alpha particles were deflected straight back, this tells us the nucleus is very small, dense and ______ charged
11 . In Rutherford's gold foil experiment, as only 1 in 8000 alpha particles were deflected straight back, and the majority went straight through, this tells us atoms have a lot of _____ _____
12 . Rutherford described the atom as having a positively charged central nucleus with a negatively charged ____ of orbiting electrons
]]> 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890210 Answers: ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890211 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890211 Answers ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890212 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890212 Answers ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890213 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890213 1. Watch the short video clips (optionally you could also bullet point key information). (5 mins) ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890214 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890214 2. Answer the follow up Questions in full sentences. ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890215 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890215 3. Self-mark using a purple pen. (the answers are at the bottom of each columns) ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890216 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890216 4. Put a star next to the idea or question you got wrong. This is the gap in your knowledge that you need to work on. ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890217 2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890217 When is my assessment? ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890218
  • Year 9x Friday 9th December P3&4 
  • Year 9y Friday 9th December P1&2 

    • ]]>     2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890218     What do I need to revise? ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890219
  • Draw a bar charts and line graphs 
  • Maths in science
  • Labeling scientific apparatus 
  • Pollution and climate change. 
  • Potable (drinking) water 
  • Periodic table 
  • Separation techniques (6 markers)
  • Atomic structure and isotopes  
  • Analysing data from investigations 

    • ]]>     2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890219     1. Atoms, elements and compounds ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890220 Task 1: Watch the video and answer the following Qs. Self-mark using a purple pen.

    1. What are all substances made of?
    2. What is a substance called when it is made of different atoms chemically combined?
    3. What is a substance called when it is made of the same type of atoms?
    4. Is water an element or compound?
    5. What is the basic building block of all substances?
    6. Is chlorine gas an element or compound?
    7. What does an element contain the same type of?
    ]]>     2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890220     2. Chemical symbols and the Periodic table ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890221 Task 2: Watch the video and answer the following Qs. Self-mark using a purple pen.

    1. What element is in period 4 and group 2? You must write the full name (Symbol not accepted)
    2. What does the periodic table contain?
    3. Which type of element is to the left of the stepped line in the periodic table?
    4. Which type of element is to the right of the stepped line in the periodic table?
    5. Which element is in period 1 and group 0?
    6. What is the second element in period 2?
    7. What is a vertical column in the periodic table?
    8. What is a horizontal row in the periodic table?
    9. What is the second element in group 2?
    ]]>     2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890221     Answers 1 - Atoms, elements and compounds ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890225 1. atoms
    2. compound
    3. element
    4. compound
    5. atoms
    6. element
    7. atoms
    ]]>     2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890225     Answers 2 ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890226 1. calcium
    2. elements
    3. metals
    4. non-metals
    5. helium
    6. beryllium - magnesium is the second element in period 3 as helium is in period 1 and Mg has 3 shells!
    7. group
    8. period
    9. magnesium
    ]]>     2022-11-13 23:06:54 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381890226     Bohr's Nuclear model ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381895777 1 . Which Danish scientist improved Rutherford's atomic model?
    2 . When Niels Bohr heated different atoms, they released different amounts of _____ energy
    3 . In Niels Bohr's experiments, when the atoms absorbed heat energy, what were excited to higher energy levels?
    4 . In Niels Bohr's experiments, when these electrons were excited to higher energy levels, they would then fall back down to _____ energy levels
    5 . In Niels Bohr's experiments, when these electrons fell back down to lower energy levels, they released an ______ amount of light energy to the amount of heat energy that was absorbed
    6 . In Rutherford's model, he said electrons surrounded the positive nucleus in cloud of ______ movement where there was a lot of empty space
    7 . Bohr suggested electrons must be orbiting the nucleus in _____ energy levels (shells) at fixed distances from the nucleus
    8 . Which scientist said the electrons orbit the nucleus in fixed energy levels (shells)?
    ]]>     2022-11-13 23:18:50 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381895777     Chadwick discovering the neutrons ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381895996 1 . Which sub-atomic particle had still not been discovered prior to 1932?
    2 . Where are protons and neutrons located in an atom?
    3 . The number of protons in an atom is calculated using the ______ number
    4 . The number of neutrons in an atom is calculated using the ____ number and atomic number
    5 . Scientists could not explain why atoms had a higher mass when they only knew about protons and electrons. What did they say was missing which caused this higher mass?
    6 . What is the charge of a neutron?
    7 . Scientists found in difficult to discover the nucleus because neutrons have no ______
    ]]>     2022-11-13 23:19:20 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381895996     Answers 1 - Mixtures ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381900388 1. compound
    2. chromatography
    3. atoms
    4. magnet
    5. mixture
    6. fractional distillation
    7. no
    8. filtration and crystallisation - saying ''FILTERATION'' is wrong
    9. yes
    ]]>     2022-11-13 23:27:31 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2381900388     3. Greenhouse effect ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382906050 Task - Copy and complete

    1. Methane and ________ ________ are greenhouse gases.
    • oxygen
    • nitrogen
    • carbon dioxide

    2. Greenhouse gases form a layer in the atmosphere. This layer reduces the amount of energy lost from the Earth by r__________.

    3. Greenhouse gases absorb radiation from the Earth, stopping it going into space. This is known as the ____________ effect.


    4. The __________ is the condition of the atmosphere from day to day. It can change rapidly.
    • weather
    • climate

    5. The _________ is the weather conditions of an area over a long period of time.

    6. Burning fossil fuels releases carbon dioxide into the atmosphere. The build-up of carbon dioxide in the atmosphere is contributing to global _______.

    ]]>     2022-11-14 13:48:16 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382906050     2. Crude oil ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382908250 Task - Sort the words into the correct order to complete the paragraph.

    Well            Refineries             Pipelines          Oceans

    Reserves of crude oil are often found beneath ________. To extract the oil, an oil rig is positioned and a _______ is drilled through the ocean floor and down to the oil. Once the oil has been extracted, it is transported by _________ or tankers to __________ on the land, where it is then processed.


    ]]>     2022-11-14 13:49:28 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382908250     1. Fossil fuels ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382914155 Task - Copy and complete the following sentences.

    1. Fuels formed from the remains of plants and animals that died millions of years ago are called ___________ fuels.

    2. Most of the fossil fuels that we use today were formed about 300 _________ years ago.
    • thousand
    • million
    3. The three main fossil fuels are coal, crude oil and natural ____ .

    4. Fossil fuels are ___________________ energy resources.
    • non-renewable
    • renewable
    ]]>     2022-11-14 13:52:49 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382914155     1. Clean water ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382922244 Task - Choose the correct answers

    1. What is potable water?
    • pure water with no dissolved salts or microbes
    • water that is safe to drink

    2. For water to be potable (safe to drink), it must have . . .
    • sufficiently low levels of dissolved salts and no microbes.
    • sufficiently low levels of dissolved salts and microbes.
    • no dissolved salts or microbes.

    3. True or false? Potable water is pure water.
    • true
    • false

    4. What is the main source of drinking water in the UK?
    • rain water
    • salt water
    • waste water

    5. What is fresh water?
    • water that is safe to drink
    • water that contains low levels of dissolved salts
    • water that contains high levels of dissolved salts
    ]]>     2022-11-14 13:57:08 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382922244     2. Making water safe to drink ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382930819 Task - Order the statements to describe how fresh water is processed into potable water.

    • Sterilise the water
    • Pass the water through filter beds.
    • Select the appropriate source of water

    Choose the correct answers

    1. Why is water from reservoirs, lakes and rivers filtered during water processing?
    • to remove dissolved salts
    • to kill microbes
    • to remove solid


    2. Why is water from reservoirs, lakes and rivers sterilised during water processing?
    • to remove dissolved salts
    • to kill microbes
    • to remove solids

    3. Which three of the following sterilisation techniques are used during water processing?
    • The water is heated to boiling point and cooled.
    • Chlorine gas is bubbled through the water.
    • A gamma radiation source irradiates the water.
    • Ozone gas is bubbled through the water.
    • Ultraviolet light is shone through the water.

    ]]>     2022-11-14 14:01:36 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382930819     Distilling seawater ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382940948 Task: Answer the following questions

    1. The apparatus shown can be used to desalinate water by distillation. What is the name of the piece of apparatus that the arrow is pointing to?

    2. What temperature will be shown on the thermometer during the distillation process shown?
    Give your answer in °C, but don't include the unit.

    3.     If the process shown is continued until all of the water has evaporated, what type of substance will be left as a residue in the round-bottomed flask?

    4. Why is fluoride added to tap water in some areas of the UK?
    • to sterilise the water
    • to reduce tooth decay
    • to reduce corrosion in water pipes

    ]]>     2022-11-14 14:07:03 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382940948     4. Atmosphere ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382943441
    Task: Choose the correct answers

    1. What is Earth's atmosphere?
    • the layer of gases that surrounds Earth
    • the rigid outer part of the Earth that consists of the crust and upper mantle
    • all of the water on Earth's surface, such as lakes and seas

    2. What is the major source of atmospheric pollution?
    • acid rain
    • combustion of fuels
    • global warming

    3. High levels of carbon dioxide in the atmosphere are causing the average temperature of Earth to increase. This rise in the average temperature of Earth is called ________________.

    • global warming
    • climate change
    • global dimming

    3. Global warming leads to climate change. What is climate change?

    • significant changes to weather patterns for a region over a long period of time
    • significant changes to weather patterns for a region over one season
    • small changes to weather patterns for a region over one year

    4. Solid particles and unburned hydrocarbons can be released into the atmosphere during burning. What are these small solid particles called?

    • smoke
    • particulates
    ]]>     2022-11-14 14:08:22 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382943441     5. Acid rain ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382952627
    Task: answer the following in full.

    1. Which of the following gases that are released when fossil fuels are burned is not a pollutant?

    • carbon dioxide
    • sulfur dioxide
    • oxides of nitrogen
    • water carbon monoxide
    • water vapour

    2. Acids formed in the upper atmosphere from reactions between non-metal oxides and water fall to earth as ________ _______.


    3. Other than acid rain, what problem is caused by sulfur dioxide and oxides of nitrogen?

    • respiratory problems in humans
    • global warming
    • global dimming
    ]]>     2022-11-14 14:13:22 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382952627     Elements, compound and mixtures ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382967606 Task: Choose the correct definitions for each of the keywords. Write in full sentences.

    1. An atom is . . .
    • the smallest unit of matter.
    • formed when two or more atoms are chemically bonded together.
    • formed when atoms of two or more elements are chemically bonded together.

    2. Elements are . . .
    • pure substances formed from one type of atom only.
    • formed when two or more atoms are chemically bonded together.
    • formed when atoms of two or more elements are chemically bonded together.

    3. Molecules are . . .

    • pure substances formed from one type of atom only.
    • the smallest units of matter.
    • formed when two or more atoms are chemically bonded together.

    4. Compounds are . . .

    • pure substances formed from one type of atom only.
    • the smallest units of matter.
    • formed when atoms of two or more elements are chemically bonded together.

    5. Mixtures are . . .

    • pure substances formed from one type of atom only.
    • formed from two or more substances, mixed together without forming chemical bonds.
    • formed when two or more atoms are chemically bonded together.
    ]]>     2022-11-14 14:21:03 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382967606     4 methods of separation ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382974820
    Choose the correct answers:

    1. Which method of separation can be used to separate an insoluble solid (such as sand) from a liquid (such as water)?

    • distillation
    • chromatography
    • evaporation
    • filtration

    2. Which separation technique is used to separate a mixture of liquids based on their boiling points?
    • sieving
    • chromatography
    • distillation
    • filtration

    3. If you wanted to make pure drinking water from sea water, which separation technique would you use?

    • filtration
    • distillation
    • evaporation
    ]]>     2022-11-14 14:24:38 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382974820     Distillation of ink ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382981012 Task - Draw the diagram and label what happens at each stage by choosing the correct answers from the questions below.
     
    1. An ink solution can be distilled to separate the water from the coloured dye particles. What happens during stage 1 of the distillation of ink?
    • The water evaporates and the water vapour rises.
    • The water vapour enters the condenser and is cooled, condensing into liquid water.
    • The solution is heated to the boiling point of the water.


    2. What happens during stage 2 of the distillation of ink?
    • The water evaporates and the water vapour rises.
    • The solution is heated to the boiling point of the water.
    • The water vapour enters the condenser and is cooled, condensing to liquid water.

    3. What happens during stage 3 of the distillation of ink?

    • The solution is heated to the boiling point of the water.
    • The water vapour enters the condenser and is cooled, condensing to liquid water.
    • The water evaporates and the water vapour rises.
    ]]>     2022-11-14 14:27:39 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382981012     Filtration ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382995761 Task - draw the diagram fully labelled

    A description for separating sand from rock salt has been mixed up. Sort the steps into the correct order.
    The first one has been done for you.

    1. Crush the rock salt into a powder and pour it into a beaker.
    2.
    3.
    4.
    • Carefully pour the mixture through a filter funnel lined with filter paper.
    • Leave the damp sand on the filter paper to dry.
    • Add water until the beaker is one-fifth full and stir the mixture.
    ]]>     2022-11-14 14:34:27 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2382995761     Evaporation ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383000116 Task: A description for separating salt from rock salt has been mixed up. Starting just after the sand has been removed, sort the steps into the correct order.

    The first one has been numbered for you.

    1. Collect the filtrate and transfer it to the evaporating basin.
    2.
    3.
    4.

    • White crystals of salt will start to appear in the basin.
    • Leave the damp salt in the evaporating basin to dry.
    • Heat the salt solution gently until it starts to bubble or spit.

    ]]>     2022-11-14 14:36:44 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383000116     Model of the atom ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383016813
    Task: Sketch the diagram above. Answer the following questions in full sentences

    1. Atoms contain three types of subatomic particles. What are they called?
    • electrons
    • protons
    • neutrons
    • nucleus
    • shells

    2. What is the centre of an atom called?
    • nucleus
    • core

    3. The electrons of an atom are held in . . .
    • a nucleus in the central region of the atom.
    • energy levels (shells) surrounding the nucleus.

    4. What is the relative charge of an electron?
    • +1
    • 0
    • –1

    5. What is the relative charge of a neutron?
    • +1
    • 0
    • –1
    ]]>     2022-11-14 14:44:27 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383016813     Make sure that you write down the titles for each sections below and answer in full sentences. ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383037094 2022-11-14 14:54:58 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383037094 Watch ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383046088 2022-11-14 14:59:32 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383046088 Watch ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383048428 2022-11-14 15:00:34 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383048428 Watch ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383051750 2022-11-14 15:02:15 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383051750 Watch ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383055666 2022-11-14 15:04:15 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383055666 Watch ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383059535 2022-11-14 15:06:08 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383059535 2. Watch - Groups and periods ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383064919 2022-11-14 15:08:33 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383064919 Atoms ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383089498 An element consists of ______ ______ of _______.
    A compound contains _____ or more __________ ______ joined together.
    A mixture contains two or more _________, but they are not chemically ________.

    Word Bank 
    elements, different, one, joined, atom, type, two
    ]]>     2022-11-14 15:18:33 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383089498     Answers ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383091009 2022-11-14 15:19:22 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383091009 Watch ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383104835 2022-11-14 15:26:42 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383104835 Watch and make notes ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383108534 2022-11-14 15:28:30 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383108534 Watch and make notes ben_sudjaitham1 https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383113976 2022-11-14 15:31:24 UTC https://padlet.com/ben_sudjaitham1/year9chemistryrevision/wish/2383113976