Unit 2: Matter - Review

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means. Examples include Oxygen (O) and Gold (Au).

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together. Examples include Water (H2O) and Salt (NaCl).

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing its identity. Examples include boiling point and melting point.

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to undergo a specific chemical change. Examples include flammability and reactivity with acids.

Front

What is the boiling point?

Back

The temperature at which a liquid turns into vapor. It is a physical property.

Front

What is the melting point?

Back

The temperature at which a solid turns into a liquid. It is a physical property.

Front

What is the fixed volume of solids?

Back

Solids have a fixed volume, meaning they maintain their shape and size.

Front

What is a homogeneous mixture?

Back

A mixture that has a uniform composition throughout. Examples include saltwater and air.

Front

What is a heterogeneous mixture?

Back

A mixture that does not have a uniform composition and can be easily separated. Examples include salad and sand.

Front

What does it mean if a substance can rust?

Back

It indicates a chemical property, specifically the ability of a metal to react with oxygen and moisture to form rust.