Physical and Chemical Changes

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, involving a rearrangement of atoms.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

What happens to the chemical composition during a physical change?

Back

The chemical composition remains the same during a physical change.

Front

What happens to the chemical composition during a chemical change?

Back

The chemical composition changes during a chemical change, resulting in new substances.

Front

Give an example of a physical change.

Back

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

Front

Give an example of a chemical change.

Back

An example of a chemical change is the rusting of iron.

Front

What is the significance of observing color change in a reaction?

Back

A color change can indicate a chemical change has occurred, as new substances with different properties are formed.

Front

What is the role of temperature in physical changes?

Back

Temperature can affect the state of matter, causing physical changes such as melting or boiling.

Front

What is the role of temperature in chemical changes?

Back

Temperature can influence the rate of chemical reactions and the energy changes involved.