What kind of change happens when you crumple a piece of paper?

• Chemical change

• Physical change

• Energy change

• Composition change

What kind of change happens when baking soda and vinegar mix and make bubbles?

• Physical change

• Temperature change

• Chemical change

• Shape change

What is the biggest source of heat on Earth?

• Fire

• Volcanoes

• The Sun

• Hot water

When ice turns into water, what is this process called?

• Solidification

• Evaporation

• Melting

• Condensation

What kind of change happens when matter shifts from one phase to another?

• Physical change

• Chemical change

• Irreversible change

• Material change

What does it mean if a change is irreversible?

• It can be changed back easily

• It cannot be changed back again

• It changes its color only

• It becomes a new material

Which of these is an example of a chemical change?

• Melting an ice cube

• Boiling water

• Cooking an egg

• Drying clothes

Which of these is NOT an effect of a chemical change?

• Sound

• Heat

• Odor

• Shape

When water boils, what kind of change happens?

• It becomes a new kind of water.

• It changes from liquid to gas, but it's still water.

• It turns into a solid.

• It disappears completely.

When paper burns and turns into ash, what kind of change is this?

• It's a physical change because it just changes shape.

• It's a chemical change because a new substance (ash) is made.

• It's a physical change because you can turn the ash back into paper.

• It's not a change at all.