Pure Substances and Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. It consists of only one type of particle.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties.

Front

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

Back

The composition stays the same.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition and appearance throughout, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the components are not uniform and can be easily distinguished, such as a salad.

Front

Give an example of a pure substance.

Back

Water is an example of a pure substance.

Front

What are pure substances composed of?

Back

Pure substances are composed of one single type of matter or element.

Front

What type of mixture is a chocolate milkshake?

Back

A chocolate milkshake is a heterogeneous mixture.

Front

What type of mixture is water with salt?

Back

Water with salt is a homogeneous mixture.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements are chemically bonded together.