science phase change

Freedom of movement

The way molecules in a substance move around relative to each other

Kinetic energy

The energy that an object has because it is moving

Molecular attraction

A pull between two molecules that is always the same for a substance

Molecule

A group of atoms joined together in a particular way

Phase

A noticeably different form or state of the same substance

Refute

To provide evidence that goes against a claim

Scale

The relative size of things

Temperature

A measure of how hot or cold something is; measure of the average kinetic energy of the particular in an object

Freeze

To change from a liquid to a solid as a result of cooling (removing energy)

Melt

To change from a solid to a liquid through the application of heat (adding energy)

Evaporate

To change from a liquid to a gas through application of heat (adding energy)

Condense

To change from a gas to a liquid as a result of cooling (removing energy)

Phase change

A change from one state (solid, liquid or gas) to another without a change in chemical composition

Solid

A state of matter that has a definite shape and volume

Liquid

A state of matter that has no definite shape but has a definite volume

Gas

A state of matter that has no definite shape or volume

Boiling point

The temperature at which a liquid changes to a gas

Freezing point

The temperature at which a liquid changes into a solid

Melting point

The temperature at which a solid becomes a liquid

Sublimation

A change directly from the solid to a gas state without becoming a liquid

Evaporation

The change of a substance from a liquid to a gas

Condensation

The change of state from a gas to a liquid

Matter

Anything that has mass and takes up space