Science Review The state of matter that has

Science Review

The state of matter that has no definite shape or volume. • gas

Changing from a gas to a liquid • condensation

The changing of a liquid to a gas • evaporation

The state of matter with a definite shape and volume • solid

Anything that has mass and occupies space • matter

The state of matter with a definite volume but no definite shape • liquid

Particles are held rigidly in place • Solid

Takes the shape of the container • Liquid • Gas

Has a definite shape • solid

Particles are touching • Solid, liquid

Particles slide over one another • liquid

Particles are far apart • gas

The freezing point of a substance is the same as its …. . • melting

Evaporation changes a …. • Liquid to a gas

Boiling water involves the same change of state as…. • evaporation

How does heat affect the state of a substance?

Increasing the heat Increases the motion of particles, which cause them to move further apart, causing the change in state

Decreasing the heat reverses the process

How does pressure change the state of a substance?

Increasing the pressure – forces the particles closer together

Decreasing has the reverse effect

In the 3 states, which particles are the closest? • Solid

Which are the furthest apart? • gas

In which state do the particles move the slowest? • solid

The fastest? • gas

How do you change a solid to a liquid? • heating

Liquid to a solid? • freeze

Liquid to a gas • Heating until it evaporates

Gas to a liquid? • Cooling it until it condenses

How is dew formed • Water condenses in the cool of the night

At room temperature what is the state of the following items?

oxygen • gas

iron • solid

water • liquid

sugar • solid

helium • gas

tissues • solid

THE END