Physical Changes

Why is a mixture considered a physical change?

• Because the components of a mixture can be separated by physical means.

• Because the components of a mixture undergo a chemical reaction.

• Because the components of a mixture change their chemical properties.

• Because the components of a mixture are always in a solid state.

True or False? Physical changes include changes in shape.

• True

• False

• Sometimes

• Only in solids

What is a characteristic of physical changes regarding the properties of substances?

• The properties of the substances involved may change, but their chemical identities remain the same.

• The chemical identities of the substances involved change during the process.

• Physical changes result in the formation of new substances with different properties.

• The properties of the substances involved remain completely unchanged.

True or False? Physical changes include changes in temperature.

• True

• False

• Sometimes

• Rarely

What is the role of energy in physical changes?

• Energy is only released during physical changes.

• Energy can be absorbed or released during physical changes, such as when ice melts or water boils.

• Energy has no effect on physical changes.

• Energy is only absorbed during physical changes.

What is an example of a physical change that involves a change in state?

• Boiling water is an example of a physical change that involves a change in state from liquid to gas.

• Melting ice is an example of a physical change that involves a change in state from solid to liquid.

• Rusting iron is an example of a physical change that involves a change in state from solid to liquid.

• Freezing water is an example of a physical change that involves a change in state from liquid to solid.

True or False? Burning wood is an example of a physical change.

• True

• False

• It depends on the type of wood

• Burning wood is a reversible change

True or False? A mixture is an example of a physical change.

• True

• False

• Sometimes

• Not applicable

Give an example of a physical change.

• Melting ice

• Burning wood

• Rusting iron

• Cooking an egg

True or False? Mixing sand and salt is an example of a physical change.

• True.

• False.

• It is a chemical change.

• It is a biological change.