The three states of matter

What are the three states of matter

solid, liquid, gas

What are solids

Extremely hard to compress

Why are solids extremely hard to compress

because the particles in a solid are packed together in a regular pattern

What’s a second thing solids have

a fixed shape and they cannot flow from place to place

Why are solids in a fixed shape

Because in a solid, the particles can vibrate

What can solids not move from

place to place

Just like solids, liquids are…

hard to compress

Unlike solids, what can liquids do

flow from place to place and take the shape of their container

Why can liquids flow from place to place

because the particles in a liquid can move

What are gasses

extremely easy to compress

Why are gasses easy to compress

because the particles in gasses are widely spaced

What do gasses do

spread out and fill the space of their container

Why can gasses spread out and fill the container

Because the particles in a gas move quickly and randomly

How can we change the state of a substance

By putting in or taking out energy

What happens if we heat a solid

it can change state to a liquid

What is it called when a solid changes into a liquid

its called melting

what does it mean if particles in a liquid are moving around

they’ve got more kinetic energy than the particles in a solid

What does it mean if particles in a liquid have more kinetic energy than particles in a solid

this means that we have to put energy in to convert a solid into a liquid

Once energy is used to break forces of attraction, what happens

The particles can now flow

What does it mean if there’s a stronger force of attraction

we have to put in more energy to break these forces And the higher the melting point

What happens if we cool a liquid

We can convert it back into a solid

What is it called when a liquid is cooled and turned into a solid

freezing

When does freezing take place

when we cool a liquid back down to its melting point

What happens when a substance freezes

the forces of attraction between particles reform

What can we convert a liquid into when heating

a gas

What is it called when we convert a liquid into a gas

boiling

When does boiling take3 place

at the boiling point

If we take Gas and cool it down, what can we convert it in to

A liquid

What is it called when a gas is cooled down and converted back in to a liquid

condensing

When does condensing take place

at the same temperature as boiling

What happens when a substance condenses

the forces of attraction between the particles reform

What does the simple particle model assume

that all particles are solid spheres