Physical and Chemical Changes 2023

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

Making a paper airplane is an example of a physical change.

Front

What happens during photosynthesis?

Back

During photosynthesis, plants convert water, sunlight, and carbon dioxide into sugars and oxygen, which is a chemical change.

Front

Is burning sodium metal in water a physical or chemical change?

Back

Burning sodium metal in water is a chemical change.

Front

What is the main difference between physical and chemical changes?

Back

The main difference is that physical changes do not create new substances, while chemical changes do.

Front

What are some indicators of a chemical change?

Back

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

Front

What is an example of a physical change that can be reversed?

Back

Melting ice is an example of a physical change that can be reversed.

Front

What is an example of a chemical change that cannot be reversed?

Back

Burning wood is an example of a chemical change that cannot be reversed.