Changing State Fact Sheet (Page 2 of 2) in pdf

Changing State Fact Sheet Page 2

melting – the process of change from a solid into a liquid

aeration - in sewage treatment the process of blowing air

bubbles through the waste water in order to help bacteria

melting point - the temperature above which a solid becomes a

digest waste matter

liquid

boiling point – the temperature above which a liquid becomes a

pure substance – matter that is not a mixture of things

gas

change of state – the process of change from one state of

sewage treatment – the process of cleaning and purifying

matter to another

sewage water for return to a river , lake or sea

condensation – the process of change from a gas into a liquid

solid – one of the three states of matter . Solids keep their

shape. The particles of a solid are very close together

evaporation – the process of change from a liquid into a gas

solidification – the process of a liquid hardening to form a solid

freezing – the process of change from a liquid into a solid

states of matter – all material exists in three states – solid,

freezing point – the temperature below which a liquid becomes a

liquid and gas

solid – for water this is 0°C

gas – one of the three states of matter . Gases move to fill any

water cycle – the cycle of events that occur naturally in the

available space. The particles in a gas are very far apart from

weather systems of the Earth where water moves through its

each other and move freely

three states

liquid – one of the three states of matter . In a liquid the parti-

water purification – the process of removing dirt and germs

cles are not as close together as in the solid form. Liquids can be

from water to make it drinkable for humans

poured and take on the shape of the container they are placed in

Changing State Fact Sheet Page 2