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Fill balloons with solids, liquids, and gas. Solids are objects that keep their own shape and
do not flow in a given temperature. Ice is a solid but when it melts it becomes a liquid.
The liquid state of matter is an intermediate phase between solid and gas. Liquids do not
have their own shape but can take the shape of the container they are in and they can flow at a
given temperature.

Take an apple or carrot and try to squeeze the water out of it noting that it cannot easily
be squeezed out. Then place the apple and carrot separately into a liquefier and observe
the apple and carrot juice being produced. Discuss the change from the solid food (fruit)
to the liquid (fruit juice). Measure how much juice was found in one carrot or one apple.
States of matter for kids - What are the states of matter? Solid, liquid and gas
www.youtube.com/watch?v=JQ4WduVp9k4

2.2. Water Cycle

The natural water cycle describes the existence and movement of water on, above, and
below the surface of the Earth.

Melting Evaporation

8

ICE WATER WATER VAPOUR

Freezing Condensation
A summary of the water cycle

Earth's water is always in movement and is always changing states, from liquid to vapor to ice and
back again. The water cycle has been working for billions of years and all life on Earth depends on
it.

Water is constantly circulating between the oceans, continents and atmosphere in a
system called the hydrologic cycle. Water from the oceans and land is transported into
the atmosphere by evaporation.

This project has been funded with support from the European Commission. This communication reflects the
views only of the author, and the Commission cannot be held responsible for any use which may be made of the

information contained therein.