Chemical and 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. Examples include burning, rusting, and baking.

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. Examples include melting, freezing, and dissolving.

Front

What happens when baking soda and vinegar are mixed?

Back

When baking soda and vinegar are mixed, a chemical change occurs, producing carbon dioxide gas.

Front

What type of change occurs when sugar dissolves in water?

Back

When sugar dissolves in water, a physical change occurs.

Front

Is cracking an egg a chemical or physical change?

Back

Cracking an egg is a physical change.

Front

What indicates a chemical change has occurred?

Back

Signs of a chemical change include color change, temperature change, gas production (bubbles), and the formation of a precipitate.

Front

What is an example of a chemical change involving burning?

Back

Burning sugar is an example of a chemical change.

Front

What is an example of a physical change involving water?

Back

Melting ice is an example of a physical change involving water.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not change the chemical composition of the substance.

Front

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

Back

The properties of substances change during a chemical change because new substances are formed.