05. Matter Changes and Properties

Front

What is matter?

Back

Anything that has mass and takes up space.

Front

What is the symbol for sodium?

Back

Na

Front

What type of reaction absorbs heat and feels cold?

Back

Endothermic reaction.

Front

What happens to silver when exposed to air?

Back

It turns a dark gray color, indicating a chemical change.

Front

What type of change is dissolving?

Back

Physical change.

Front

Define physical change.

Back

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

Front

Define chemical change.

Back

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

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Rusting of iron.

Front

What is the difference between an exothermic and endothermic reaction?

Back

Exothermic reactions release heat, while endothermic reactions absorb heat.