Physical and Chemical Changes Review

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What is a sign of a chemical change?

Back

A sign of a chemical change can include the production of a new odor, color change, gas production (bubbling or fizzing), or the formation of a precipitate.

Front

True or False: Physical changes can result in a change of state, such as solid to liquid.

Back

True

Front

What often indicates a chemical change has occurred?

Back

Fizzing or foaming often indicates a chemical change has occurred.

Front

What happens to the properties of a substance during a physical change?

Back

The properties of a substance may change, but its chemical identity remains the same.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood, which produces ash and smoke.

Front

What can cause a chemical change to occur more rapidly?

Back

An increase in temperature can cause a chemical change to occur more rapidly.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change does.