Physical & Chemical Changes

Front

Boiling water is an example of a _____ change.

Back

Physical change: A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

Dissolving sugar in water is an example of a ____ change.

Back

Physical change: The process where sugar molecules disperse in water but do not change their chemical structure.

Front

Is melting butter for popcorn a chemical or physical change?

Back

Physical change: Melting is a change in state from solid to liquid without changing the chemical identity of the butter.

Front

Freezing juice is a _____ change.

Back

Physical change: Freezing is a change in state from liquid to solid, maintaining the chemical composition of the juice.

Front

Are these molecules also compounds? YES or NO

Back

YES: Compounds are substances formed when two or more elements are chemically bonded together.

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 an example of a chemical change?

Back

Burning wood: It transforms into ash, smoke, and gases, changing its chemical composition.

Front

What happens to the molecules during a physical change?

Back

The molecules rearrange but do not change their chemical structure.

Front

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

Back

Physical changes affect physical properties without changing chemical composition, while chemical changes result in new substances.

Front

What is an example of a physical change?

Back

Melting ice: Ice changes from solid to liquid but remains water (H2O).