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Year 7 Particles Key Words

Date : 28/02/2021

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Uploaded by : Tamzin
Uploaded on : 28/02/2021
Subject : Chemistry

Particles (Year 7)

Atom

The smallest particle of an element that can exist.

Boil

Change from liquid to a gas of all the liquid when the temperature reaches boiling point.

Compound

Pure substances made up of two or more elements strongly joined together.

Condense

Change of state from gas to liquid when the temperature drops to the boiling point.

Contraction

Where the volume a substance takes up reduces in size (because particles lose energy).

Diffusion

The process by which particles in liquids or gases spread out through random movement from a region where there are many particles to one where there are fewer

Element

What all substances are made up of, and which contain only one type of atom

Evaporate

Change from liquid to gas at the surface of a liquid, at any temperature.

Evaporation

Separating substances by boiling and condensing liquids.

Expansion

Where the volume that a substance takes up increases (because particles have more energy).

Freeze

Change from liquid to a solid when the temperature drops to the melting point.

Gas

A state of matter in which the particles fill the shape and volume of the container.

Gas Pressure

Caused by collisions of particles with the walls of a container.

Liquid

A state of matter that adapts the shape of the container it is held in.

Melt

Change from solid to liquid when the temperature rises to the melting point.

Mixture

Single type of material with nothing mixed in.

Molecule

Two to thousands of atoms joined together. Most non-metals exist either as small or giant molecules.

Particle

A very tiny object such as an atom or molecule, too small to be seen with a microscope.

Particle model

A way to think about how substances behave in terms of small, moving particles.

Solid

A state of matter that has a fixed volume and shape.

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Year 7 Particles Key Words

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