5.P.2.3 Chemical and Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

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

Give an example of a chemical change.

Back

Frying an egg is an example of a chemical change.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

What happens to the substances in a chemical change?

Back

In a chemical change, the original substances are transformed into different substances.

Front

What is rust?

Back

Rust is a chemical compound formed when iron reacts with oxygen and moisture in the air.

Front

What is an indicator of a chemical change?

Back

The formation of a gas, change in color, or production of heat are indicators of a chemical change.

Front

What happens to an apple when it turns brown?

Back

The browning of an apple is a chemical change due to oxidation.

Front

What is an example of a substance being formed?

Back

Wood burning is an example of a new substance being formed.

Front

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

Back

A chemical change results in new substances, while a physical change does not change the chemical identity of the substance.