Science Hunters! by Diana Goyder https://padlet.com/diana_goyder/lb28o9rdt0qq Go on a Science walk of your house. What examples of change can you see? Are they physical or chemical changes? How do you know? Are they reversible or irreversible? What are the signs that a chemical reaction has taken place? Can you find an example in your house (no dangerous chemicals necessary!)? Take photos and add captions to explain what is happening, using scientific vocabulary. Challenge yourself to see how many connections you can make with our central idea or lines of inquiry. en-us 2017-12-07 13:54:29 UTC 2024-05-30 19:06:29 UTC hello@padlet.com UNIT VOCABULARY diana_goyder https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214108818 ATOM, CHEMICAL, CONCLUSION, DISSOLVE, GASES, HYPOTHESIS, IRREVERSIBLE, LIQUIDS, GASES, SOLIDS, MATERIAL, MATTER, PHYSICAL, PROCEDURE, REACTION, REVERSIBLE, SOLIDS, SOLUTION, SOLVENT, VARIABLE. ]]> 2017-12-07 14:03:54 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214108818 HOW THE WORLD WORKS diana_goyder https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214110208 Central idea:
Changes in matter are governed by scientific principles.

Lines of Inquiry:
  • The physical and chemical properties of matter
  • Ways matter can be physically and chemically changed
  • Interactions between substances 

  • Key concepts
    Change, Causation


]]> 2017-12-07 14:06:24 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214110208 UDAY https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214197410 #1: Microwave

The microwave uses heat waves to change (Boom) the heat of the food. All the changes from the microwave.
It make physical changes. The changes are reversible though, if you give it some time.

#2: Toaster 

For the toaster you can see that there has been a chemical reaction/change (Boom) when you take the piece of bread out it is a bit burnt and that is a chemical change. It is an irreversible change. No matter how hard you try

#3: Oven:

 The oven has dozens of chemical reactions happening inside and heats up the food magnificently or can bake stuff. For example if you put self rising flour in it will make a HUGE amount of bread. Therefore it has many chemical reactions. It has both chemical changes and physical changes. Sometimes the changes are reversible but other times they are not. If you put in flour it will rise and rise eventually making a loaf of bread and it slightly changes the chemical properties.

#4 Radiator

Most of the time a radiator does not have chemical reactions but sometimes a chemical reaction does happen a therefore it blocks the radiator. Sometimes chemical reactions are good (In the oven case) but other times they are bad (In the radiator case. The radiator heats up the water a lot (a physical change) but does not affect the chemicals. It is a reversible change though because if you give it enough time it will cool back down. 

#5 Fridge

Sometime there are chemical reactions inside the fridge such as decomposing but however the fridge itself does not have any. Sometimes it makes physical changes to the stuff inside it e.g. frost but VERY VERY VERY rarely does it have chemical changes inside. After you take something out and water droplets start appearing it is because when the hot meets the cold it condensates and therefore there are water droplets on the thing you took out specifically cans or water bottles.

#6 Stove

Whenever you turn on a stove there is a chemical reaction called a combustion reaction and it helps cook the food. The stove makes both chemical and physical changes and it also makes reversible and irreversible changes. It has a mix of everything because you can put almost anything on it!!!

Caption:  All the stuff happens at the top!!

]]> 2017-12-07 16:28:49 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214197410 Emma https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214220773
2#Vitamix (blender)
if you put Whole Foods inside, they will blend into a creme or luquid. It is a physical change and it can't be returned to it's original state so it is a irreversible stage.

]]> 2017-12-07 17:08:45 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214220773 Anna https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214229314 1. Coffee Machine
 
 Inside the Nespresso capsule there is coffee powder - which is in the state of a solid. The coffee machine adds hot water to the powder and as a result the atoms (in the powder) start to melt into the liquid form.
When the coffee comes out you can see that there is steam, which means the water in the coffee is already starting to evaporate. These two changes that happen in the procedure of making coffee are physical changes. For example, when the water in the coffee starts to evaporate  into the gas, then that means there has been a change in the form the atoms behave and their physical form. I think it is a reversible change because the water can condense back into the liquid form. Besides that, if the water in the coffee evaporated then the coffee powder (in the form of a liquid) would turn back into solid.


2. Microwave

 A microwave releases heat waves, heating a liquid or food. It is a reversible change because the food can cool down and be cold again. Besides that, microwaves can melt food, meaning that the atoms in the food change their physical form. In addition to that, both of the changes are physical changes. For example, the microwave has changed the temperature of the solid/liquid.
Moreover, when food is heated, the atoms (solid) melt into the liquid form - changing the way they behave and also changing their physical form. It is not a chemical change because the microwave has not changed the chemical components in the food/liquid. 


 
]]> 2017-12-07 17:24:49 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214229314 Adi https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214231563 1. Blender

If you put fruits they will blend into juice or creme. This is a physical and irreversible change because you can't turn juice back into fruit and make it look the same.

2.Fridge 

Sometimes there can be a chemical reaction inside  the fridge such as breaking up or decomposing but the fridge itself does not have any chemical reactions. It could also rarely make  physical changes example it has chemical changes inside it.

3. Shower

If you take a shower and its a little hot you would normally turn a knob and it will turn colder thats a reversible change because you can make a change which is making it colder and you can revers it back to hot

4. coca cola can

 this is a chemical change because the pressure inside a coke bottle is much higher than the pressure outside the coke bottle. This helps keep the soda bubbly. That is, the additional pressure at the surface of the liquid inside the bottle forces the bubbles to stay dissolved within the soda.
When the coke is opened, there is suddenly a great pressure differential. The initial loud hiss that is heard the pressure equalising itself. All of the additional pressure found within the bottle pushes gas out of the bottle until the pressure inside the bottle is the same as the pressure outside the bottle. The movement of this gas causes that initial loud hiss.




]]> 2017-12-07 17:28:55 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214231563 Ananya https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214233482 Fluidified slime 
When slime has been sitting around for a while It turns back into glue. This is a reversible change as you can add more activator. 

Shower 
When the shower is in it's first stages of heating up it there aren't a lot of physical changes. After around 30 seconds ( for my shower)you will start to see A gray substance emerging from the water. you might think this is water in it's gaseous form, but in fact it is super small droplets or water and is therefore condensation (A liquid). 

 Lentils
When the lentils are cooked in the pressure cooker (I will talk about the pressure cooker later) they are absorbing the water and becoming a liquid instead of a solid. The pressure cooker creates pressure by heating up the liquid inside which make it evaporate. As you already know, gases take up more volume than their liquid form. This creates a lot of pressure in the pot. the reason this helps with cooking is that the boiling point lowers, the higher the pressure making the lentils cook faster.











]]> 2017-12-07 17:32:11 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214233482 https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214245507 2017-12-07 17:54:10 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214245507 Yağmur https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214249029 2017-12-07 18:01:02 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214249029 Pedro https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214250198 #1: Stove

The stove makes physical changes, some reversible changes and irreversible changes. Depending on the thing it's cooking it could dissolve and turn into liquid or it could evaporate and turn into gases.

#2: Blender

When you put a solid in the blender it will turn into a liquid (in this case: juice or creme). As the solid will be smashed (into creme or juice), it will be an irreversible change.

#3: Slime

When you leave slime out for too long, it will dry out. That is a reversible change as you can make it back to normal putting it in warm water (38°C).

#4: Toaster

The toaster has chemical change/reaction, irreversible change and physical change. You can see there is a chemical reaction/change because the heat of the toaster (176°C) making it brown and crispy. You can see there is a physical change because of the colour change and it makes it crispy (feel change). You can see it is irreversible because you can't un-toast it.



]]> 2017-12-07 18:03:18 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214250198 Ava https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214252744 #1: Stove
As you put something into it, like an egg yolk, there is a physical change. The chemical composition  chages due to heat, from a liquid to a solid, yet still being a bit liquid, asi can be quite floppy. The heat expands the yolk, and as most things become more solid as you burn them.

#2: Slime
If you leave them out for too long, they expand out. That is due to gravity, pushing it down as it can't stay like that. It is also a liquid, with most ingredents are the same, for example glue. liquid can expand to wherever, as long as there is enough. in a cup, the water your about to drink forms itself to fit the cup. it is the exact same case with slime.]]> 2017-12-07 18:08:19 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214252744 Yağmur https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214274427 Kettle: When kettle heat water the evaporates and heats the water. So the thing that is above of the kettle gets wet that is why it is a reversible change. Also it is a physical change.
Toaster: Toaster makes slices of bread toast and more crunchy. It is a irreversible change because toasted bread never cane be same as before it toasted. And it is a physical change.
Fridge: Fridge refrigerates liquids to ice which is a reversible change.
And it is a physical change.


]]> 2017-12-07 18:51:36 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214274427 Selin https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214277012 #1 Toaster

The toaster has lots of examples of science happening. The examples of change are irreversible because when you put in the bread through the open gaps the bread changes colour from the heat which is irreversible change and a chemical change. It is a physical change because the colour you can see has changed but it is more of a chemical change. The reason for that is because the colour is different and it is more crispy than it was before so the molecules or adams have changed because the bread is different than it was before.

#2 Oven

The oven has chemical reactions going on everywhere.  When you put in the food it heats up and you can bake lots of delicious treats, for example cakes, pastries, pizza, bread. If you put yeast inside of the oven it starts to rise slowly and soon after a while it will become bread. Hence, there are many chemical reactions happening. This is a irreversible change because once you cook something it won't uncook itself back that's why you have to be very careful before you make a decision on what to cook. There are chemical changes and physical changes happening at the same time because whilst the yeast is rising it starts to change colour. The reason behind that is because the yeast is uncooked and when it is in the oven it heats up which changes it's shade of colour.

#3 Coffee Machine

The coffee machine has container which has a coffee powder and the coffee powder is in solid form. For the coffee machine to produce coffee you need to add some hot water to the capsule/ container the powder is in. Once the hot water is poured the powder starts to melt into a liquid state. Whilst the coffee machine is spluttering out the coffee there is steam coming out. This is a sign that means the water is slowly evaporating because of how hot the water was when it was added. There are two types of changes that are happening. One of them is a chemical change because once the water is added to the powder, the powder turns into another state of matter. The last one is a reversible change because while the steam starts to rush out, you can turn it back into its old state(liquid). You have to leave it by a window so it cools down. Later, it would have condensed into water because it would have been colder.

#4 Microwave 

The microwave uses heat waves and motion (by spinning) to heat up a meal whether it's cold or needs to be warmer for someone to eat. It is a reversible change because whatever you put inside needs to be heated and you can unheat it by leaving it out so it just gets colder.]]> 2017-12-07 18:56:18 UTC https://padlet.com/diana_goyder/lb28o9rdt0qq/wish/214277012