Pure Substances & Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements and compounds.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each retains its own properties. Examples include air, salad, and lemonade.

Front

Which of the following is a pure substance: Water, Sugar, Gold, or ALL of them?

Back

ALL of them are pure substances.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include Oxygen (O) and Carbon (C).

Front

Which of the following is NOT a mixture: milk, lemonade, vegetable salad, or carbon?

Back

Carbon is NOT a mixture; it is an element.

Front

What is matter?

Back

Matter is anything that has mass and occupies space.

Front

Give an example of a pure substance.

Back

An example of a pure substance is distilled water.

Front

What is the difference between a pure substance and a mixture?

Back

A pure substance has a uniform and definite composition, while a mixture contains two or more substances that retain their individual properties.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together. Example: Water (H2O).

Front

What is a homogeneous mixture?

Back

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