Name: _________________________
Hour: ________
Particle Movement
Particle Movement in Water:
1. Prepare 200 ml of hot, cold, and room temp water.
2. Place three equal drops of food coloring into each beaker. Observe
and record the following information:
Average
Temp. (oC)
Hot Water
Room Temp
Cold Water
Analysis Questions:
1) Describe how each beaker looked right
after the drops of food coloring were
added. ___________________________
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2) Describe how the drop of color spread out.
(If needed, draw a picture.)
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3) Why do you think the color moved the way it did.
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4) Explain how temperature affects the movement of the food coloring.
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Particle Movement through Air:
1. Put 1 squirt of Vanilla extract into a balloon. Carefully blow the
balloon up and tie it. (Do not get Vanilla extract in your mouth)
2. Shake the balloon for 30 seconds.
Analysis Questions:
1) Smell the balloon, what do you smell? ________________________
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2) Why do you think this happens?
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3) Analogy: Explain how the balloon is similar to a cell membrane.
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Cornstarch in a Bag:
1. Fill a beaker about halfway full with water and put about ten
drops of iodine into the water.
2. Put about 5 ml of starch and 25 ml of water in a plastic lunch
bag and tie. Make sure the bag is air tight.
3. Place the bag into the beaker. Keep the tied portion on top and
let sit for about 15 minutes.
NOTE: Iodine is an indicator that turns __________ (what color) in the
presence of starch.
Analysis Questions:
1) Define permeability. ________________________________________
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2) To which substance is the plastic bag permeable? ___________________
3) Why did the iodine enter the bag? ______________________________
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4) Why didn’t the starch enter the beaker? _________________________
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Analogy: Explain how the plastic bag is similar to a cell membrane.
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