Front

What happens to the composition of pure substances during a physical change?

Back

The composition stays the same.

Front

What are pure substances composed of?

Back

One single type of matter or element.

Front

Can you give an example of a pure substance?

Back

Water.

Front

What type of mixture is a salad made of tomato, lettuce, and corn?

Back

Heterogeneous mixture.

Front

What type of mixture is formed when salt is dissolved in water?

Back

Homogeneous mixture.

Front

What is the definition of a pure substance?

Back

A material that has a constant composition and consistent properties throughout.

Front

What distinguishes a homogeneous mixture from a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition, while a heterogeneous mixture has a non-uniform composition.

Front

Is air a pure substance or a mixture?

Back

Air is a mixture.

Front

What is an example of a heterogeneous mixture?

Back

A salad or a bowl of mixed nuts.

Front

What is an example of a homogeneous mixture?

Back

Saltwater or sugar dissolved in water.