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SYMMETRY OF MATTER |
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PHYSICAL
SCIENCES – SYMMETRY OF MATTER Objective: Students review the states of matter.
Materials:
baking soda
cornstarch glycerin
graduated cylinder (10 ml) plastic
cup
Teacher Notes:
This unit should help you determine the background of your students on their overall knowledge of matter. Students may have completed these activities before but not while thinking about the states of matter. Make sure students realize while doing the activity they should be thinking about the state of matter at each station. Discuss answers with students after they finish each station.
ANSWERS: 1. Matter is everything 2. 5, solid, liquid, gas, plasma, Bose-Einstein Condensate 3. shape, mass, color, crystal structure, melting point, freezing point, etc Station 1. In lower grades students may have called this “ooblek.” It is forming a substance that can flow or break like a solid (if done quickly). Mare sure the students put in the right amount. If they put in too much water, you can add more cornstarch. This is a colloidal suspension (both solid and liquid) Station 2. Baking soda is a solid, vinegar is a liquid; produces a gas and a liquid through a chemical reaction Station 3. Bromothymol blue is a liquid; air from lungs CO2 (gas); you may want to premix the Bromothymol blue with water to make a blue mixture for all classes (the liquid will turn blue again when oxygen from the air is added); chemical change from blue to yellow , carbon dioxide causes the changes Station 4. Plaster of Paris (solid), water (liquid); produces a hard solid through a chemical reaction (hydration) Station 5. water and glycerin are liquids; a bubble is liquid on the outside and gas on the inside Station 6. borax (solid), glue (liquid), mix together and turns into a slime, a slow moving liquid; chemical reaction unlike station 1
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