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1. In your groups, work on page 2, come up 5 different hypothesis, and decide on 1 which your group will work on.

2. Let Mdm Liu check then type hypothesis, planning for expt, into the padlet under your group's column.

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a) Hypothesis:

b) Variables for expt

c) Materials for expt

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If the size of parachute larger, then Lego man will float longer.

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a) if the ice is left on a tray that is a good conductor of heat then it will melt faster

b) the material of the tray

c) ice, metal tray, ceramic tray, glass tray, stop watch

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To be changed: The size of plastic bag

To be measured: The time taken for Lego man to float

To be kept: size of Lego man and height to drop Lego man

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Quantity Materials

1 Plastic Bag small

1 Plastic Bag big

1 Lego Figure (volunteer)

4 Strings

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Hypothesis:

If salt is added into the ice water then the temperature will increase.

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Variables:

To be changed: mass of salt

To be measured: temperature of the ice water

To be kept constant: amount of ice and volume of the water

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Materials:

Salt (4 tablespoon)

8 Ice cubes

2 Thermometer

2 Beaker

100ml of water for both beakers

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a)If the plant was watered with milk then it will grow faster.

b)Changed-Type of liquid used to watered the plant.

Measured-Time taken for the plant to grow

Constant- Location, Amount of sunlight, Volume of liquid and type of plant

c)Milk, Water, Seed, Soil and a Pot

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a) If the sugar has a bigger exposed surface area, then it will dissolve faster.

b) To be changed: Type of sugar

To be measured: Time taken for the sugar to dissolve

To be kept constant: Volume of water used and amount of sugar used

c) - 2 Beaker

- Measuring cylinder

- Granulated sugar

- Icing sugar

- Water

- Spatula

- 2 stopwatch

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a) How does the amount of vinegar affect the expansion of a balloon with a fixed amount of baking powder?

If there is more vinegar added to baking soda, then the balloon used to measure the reaction will expand more.

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All the materials needed:

1 measuring cylinders,

2 bottles (will bring)

1 weighing scale

1 pack of baking soda

1 bottle of vinegar

3 balloons

1 bowl/plate/beaker

b)

to be changed : vinegar

to be measured : size of balloon during the reaction

to be kept constant : amt of baking soda + the type of balloon

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If the shapes of the ice are different then it would different timings to melt

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To be changed :

Shape of the ice cubes

To be mesured:

How long it takes for the ice to melt

To be kept constant:

The volume of water

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-stopwatch

-ice molds

-zipblock bags

-ice cubes

-measuring cylinder

-water bottle

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How does each method affect the cleanliness and taste of the water (Question)

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How does each method affect the cleanliness and taste of the water (Question)

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If the water evaporates using different methods, then the taste and purity would vary

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How does the arrangement of compounds affect the flow of electric currents? (Question)

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How does the arrangement of compounds affect the flow of electric currents? (Question)

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if the closer the compounds are arranged, then it would be easier for the electric currents to flow through them

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How effective is homemade cleaning solution compaired to store bought cleaning solution

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How effective is homemade cleaning solution compaired to store bought cleaning solution

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If there is more mould grown on either of the cleaning solution soaked bread, then we will know which cleaning solution is more effective in preventing germs

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if salt is added then the ice will malt faster

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if salt is added then the ice will malt faster

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to be changed: salt

to be measured: time taken

to be kept constant: number of ice cube

2 plate

2 ice cube

0.5g salt

1 stopwatch

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The more candles we add, the faster the candles will burn out and water will fill the glass beaker/cup.

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To be changed : Number of candle used

To be measured : Time taken for the water to go into the glass cup until the candle burns out

To be kept constant : Volume of water in the large plate

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1. Large plate/dish/bowl-1

2. Glass cup/beaker(tall)-1

3. Candles~6

4. Bottle cap or anything that can hold the candle upright to prevent accidents.-1

5. Colouring/ink(red and blue)

6. Stopwatch

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What you'll need:

JAMIE GRILL

One part white vinegar

One part water

Lemon rind

Rosemary sprigs

Combine the above ingredients together, pour into a spray bottle, shake and then let infuse for a week before using. (For a different scent, you can also try orange rinds, cloves or cinnamon sticks). After a week, use the homemade all-purpose cleaner to remove hard water stains, clean trash cans, wipe away wall smudges and much more. Besides a fresh scent, the lemon rind may help boost cleaning power.

Spray two sprays of each cleaning solutions and wipe with a tissue paper ten times then put bread a each of the surface for 2 to 3 days and measure the amount of mould on each bread

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1.fill two beakers with 100ml of water

2.add 4 ice cubes in each beaker

3.add 4 tablesppons of salt into only one beaker

4.wait 5 to 10 seconds

5.put both of the thermometer into both of the beakers and make sure they are up right

6.take the measurement of the thermometer and write it down

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Expt Procedure:

1. Measure 100ml of water in the measuring cylinder then pour it into each of the two beakers.

2. Add a spoon of icing sugar with the spatula into one beaker, then start the stopwatch.

3. Add a spoon of granulated sugar with the spatula into the other beaker, then start the stopwatch.

4. Stop the stopwatch and record the time taken for the sugar in each beaker to dissolve.

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Procedure:

1. Pour 15ml of milk and 15 ml of water onto two pieces of cotton each.

2. Place a green bean on each piece of cotton.

3. Place them somewhere where there is warmth and oxygen.

4. Record the day when the green bean sprout.

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what are the cleaning substances that can be used in households (Question)

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what are the cleaning substances that can be used in households (Question)

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If we compare the cleaning substances, then we would find out which is better at getting rid of messes

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1. Place the bowl on an even surface

2. Get water and add the coloring in it

3. Place the candle or candles on the bowl

4. Safely light up the candle or candles with a lighter

5. Place the glass cup over the candle

6. Start the stopwatch the moment you place the cup over the candle

7. Stop the stopwatch when the candle or candles burn out

8. Repeat these step 3 times with different quantity of candles that follow the order 1,2,3

9. End of experiment

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add 0.5g salt in one of the ice and start the stopwatch

take note of the timing

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1. In your groups, work on pg 6 of the PBA worksheet.

2. Post the presentation on the padlet under your group's column.

3. In the meantime, ensure pages 2-5 are done to your best ability (meet the Rubrics Exceeding criteria). Teachers will go around to check.

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Villanueva John luke semblante (Dazhongps)

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Ice cube without salt vs ice cube with_JK

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science WA3 video, conducting of experiment. will fine or coarse sugar dissolve faster in water?