WATER
- What colour is water?
- What does water smell like?
- What does water taste like?
BUT....What is water? Water is a liquid that can be in three different states or forms: solid, liquid or gas.
STATES OF WATER IN NATURE
- Liquid: rivers, seas, oceans, lakes, waterfalls, clouds, tap,…
- Solid: ice,
icebergs, hailstones, snow.
- Gas: water vapour; for example, when we cook pasta. Water evaporates at 100º C!!!
WATER: CHANGE OF STATES
- Water is a liquid, but… what happens to liquid
water when it is very cold?
- Water turns solid. It becomes ice, and ice is
a solid.
- What happens to liquid water when it gets very hot?
- When water gets hot, it turns into a gas:
water vapour. Water vapour is a gas.
- What happens to water vapour when it gets colder?
THE WATER CYCLE:
- Evaporation:
First, the sun shines on the sea. It warms the water. Then, the water becomes water vapour. This process is called evaporation. The wind carries the water vapour up into the sky.
- Condensation:
High in the sky the air is cooler. When the water vapour meets the cooler air, it becomes very small drops of water that form clouds. This process is called condensation.
- Precipitation:
The small drops of water join together and become raindrops. The raindrops are bigger and heavier than the clouds and fall to the ground in the form of rain, snow or heal. This process is called precipitation.
- Collection:
The rain falls into the rivers, oceans, lakes, waterfalls, etc. which collect the water that has fallen. This process is called collection. Water evaporates
into the sky again and the cycle starts over again!!!
Now, let's watch some videos and play games!
