Physical and Chemical Change Assessment

Click on the examples of physical changes:

• Tearing paper
• Trail Mix
• Cutting hair
• Dry ice sublimation
• Baking cookies

What are 3 indicators that a chemical change has taken place?

Click on the chemical changes:

• Baking a cake
• Burning wood
• Film canister rockets
• Fireworks exploding
• Tearing paper

What does the Law of Conservation of Mass mean?

• Mass cannot be created or distroyed.
• Mass can be created or distroyed.
• Mass can change states but cannot change back.
• We need to recycle mass to save the Earth.

In our first experiment, we created a polymer. What is a polymer's main job?

• To become a hard plastic that cannot be broken
• To be both a solid and a liquid at the same time
• To absorb and hold up to 100 times its mass
• To condense and shrink masses

In complete sentences, describe what happened when we added Phenol Red to the baking soda and calcium chloride. Be descriptive.

When we mixed the copper sulfate, hot water, and ammonia, why did the new chemical have less mass than the total of the starting materials?

• The copper sulfate crystals dissolved into the liquids.
• The hot water melted the copper sulfate crystals.
• The ammonia destroyed the water.
• The chemical change created a gas that was released into the air.

What caused the rockets to go up into the air?

Why are lab safety and following directions essential during science experiments?

Give an example of a physical change in your daily life.