Grade 6 - What is Matter? - Unit 2

Boiling

liquid to a gas

Freezing

liquid to a solid

Condensation

gas to a liquid

Deposition

gas to a solid

Physical Change

A change that alters the form/appearance of a substance but does not change it into something new

Physical Property

A characteristic that can be observed without changing it into a new substance

Chemical Property

A characteristic that describes its ability to change into different substances

Compound

A substance made up of two or more elements in a set ratio

Matter

Anything that has mass and volume

Solid

State of matter with a definite shape and volume

Gas

State of matter with an indefinite shape and indefinite volume

Liquid

State of matter with an indefinite shape but definite volume

Element

Substance that cannot be broken down into any other substance

Atom

The basic particle from which all elements are made

Chemistry

The study of matter and how it changes

Molecule

Two or more atoms held together by chemical bonds

Mixture

Two or more substances together in the same place but not chemically combined

Pure Substance

When something is only made up of 1 element or 1 molecule. Examples: Gold, Water, Steel, Sugar, Salt.

Chemical Change

When two or more substances combine or break apart to form new substances

Sublimation

solid to a gas

Melting

solid to a liquid

Chemical Bond

the force of attraction that holds two atoms together