Chemical vs 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

Burning wood is an example of a chemical change because it transforms the wood into ash and smoke.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change because it changes from solid to liquid but remains water.

Front

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

Back

The properties of a substance change during a chemical change, resulting in new substances.

Front

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

Back

The properties of a substance may change in appearance or state, but the substance itself remains the same.

Front

What is an indicator of a chemical change?

Back

Indicators of a chemical change include color change, gas production, temperature change, and the formation of a precipitate.

Front

What is an indicator of a physical change?

Back

Indicators of a physical change include changes in state (solid, liquid, gas) or shape without new substances being formed.

Front

Is rusting of iron a physical or chemical change?

Back

Rusting of iron is a chemical change because it forms a new substance, iron oxide.

Front

Is dissolving sugar in water a physical or chemical change?

Back

Dissolving sugar in water is a physical change because the sugar can be recovered by evaporating the water.