Physical vs Chemical Changes

Front

What is a physical change?

Back

A change that does not result in the formation of a new substance. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A change that results in the formation of one or more new substances. Examples include rusting, burning, and cooking.

Front

Cooking an egg is an example of which type of change?

Back

Chemical change.

Front

Sharpening a pencil is an example of which type of change?

Back

Physical change.

Front

Stepping on a Coke can is an example of which type of change?

Back

Physical change.

Front

What happens to thermal energy during a chemical reaction?

Back

Thermal energy (heat) is either released or absorbed.

Front

What is an indicator of a chemical change?

Back

Change in color, temperature, gas production, or formation of a precipitate.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Burning wood.

Front

What does it mean when a substance undergoes a change in temperature?

Back

It indicates that thermal energy is being absorbed or released during a reaction.