power point for second grade science

1. Unit 6 Nature

2. Where can you find water in nature? You can find water in sea river stream lake waterfall

3. You can also find water... snow clouds rain iceberg underground

4. What is water like? Water has no colour. It is colourless. Water has no taste. It is tasteless. Water has no smell. It is odourless.

5. The states of water We can find water in nature in 3 different states: When it is very cold, water turns into a solid: ice or snow. At room temperature water is a liquid. When it is very hot, water turns into a gas. It is called water vapour.

6. Changes of state The change from liquidwater to water vapouris called evaporation. When liquid water changes to a solid it is called freezing. When water vapour turns into liquid is called condensation. When icechanges to liquid water is called melting. melting evaporation freezing condensation liquid solid gas

7. The water cycle Evaporation The sun heats up water in oceans, rivers or lakes. Water changes from liquid to water vapour. It leaves the oceans, rivers or lakes and goes up in the air.

8. The Water Cycle Condensation Water vapour in the air gets cold and changes back into tiny drops of liquid water forming clouds.

9. The Water Cycle Precipitation The clouds get heavy and water falls back to the earth as rain, hail or snow. Rain Snow Hail

10. The Water cycle Collection Water from the rain, snow of hail falls back into lakes, rivers and oceans. Rivers go to the sea... and the water cycle starts again.

11. Water cycle The water cycle is a continuous process of evaporation, condensation, precipitation and collection. It is happening everywhere and all the time. It never stops!!!!!!!

12. Day and night The Sun shines during the day. We see the Sun in different positions at different times of the day. It is midday. The Sun is high Up in the sky. The Sun in the afternoon. The Sun is rising in the morning. The Sun is setting

13. How do we have day and night? When the Sun shines on one part of the Earth it is day there. It is night on the part of the Earth where the Sun is not shining. The Earth rotates around itself. It takes 24 hours to do one full spin. Moon Day Night Earth

14. The Sun The Sun is a big star which give us light and heat. The Earth is a planet that revolves around the Sun. The Earth takes 365 days (1 year) to travel around the Sun. The Earth also rotates around itself. It takes 24 hours (one day) to do a full spin. Moon Sun Earth