1. Planet Earth

2. Earth is the third planet from the sun. The Earth is filled with tons of living organisms. Organisms are living things. 1.1 PLANET OF LIFE

3. There are three places where organisms can be found. The lithosphere, the hydrosphere, and the atmosphere are the places where they can be found. 1.1 PAGE 2

4. One of the reasons organisms can live on earth is that earth has liquid water. Liquid water helps with many thing like heating the earth. 1.1 PAGE 3

5. The Lithosphere: a layer of rock that covers the earth from 10 to 200 kilometers deep. There are three types of rock that make this up. 1.2 EARTH’S LAND AND WATER

6. One type is the igneous rock. This is formed when liquefied rock is cooled and becomes solid. 1.2 PAGE 2

7. Another rock is the sedimentary rock. This rock is formed by the weathering of other rocks and then those sediments get compressed and cemented into rock. 1.2 PAGE 3

8. The last type of rock is the metamorphic rock. This rock is formed with lots of heat and pressure. 1.2 PAGE 4

9. The hydrosphere: the part of earth where all the water based animals live. 1.2 PAGE 5

10. 70% of the world is covered in water. 97% of that water is salt water. The salt water contains 35 grams of salt in a liter. The other 3% of the water is fresh water. 1.2 PAGE 6

11. Two-thirds of the fresh water exists in frozen glaciers and ice caps and because there is little fresh water, it is a valuable substance. 1.2 PAGE 7

12. Not all water is above ground. A lot of water is found underground. There are two types of underground water. Aquifer: underground places filled with water and Artesian wells: water flows to the surface due to high pressure underground. 1.2 PAGE 8

13. The Atmosphere: an envelope of gases that surrounds earth and also holds the air we breath. 1.3 THE ATMOSPHERE

14. There are four different layers of the atmosphere. There is the troposphere, the stratosphere, the mesosphere, and the thermosphere. 1.3 PAGE 2

15. The lowest part is the troposphere and the next it the stratosphere. The troposphere: the layer that holds most of the weather and touches the earth. The stratosphere: reaches the height of 50 km above earth and also contains a gas called ozone. 1.3 PAGE 3

16. 1.3 PAGE 4 The next two layers are the mesosphere and the thermosphere. The mesosphere: it extended up to 85 km above earths surface. The thermosphere: the outmost layer of the atmosphere and it can get up to 2000 degrease C.

17. The biosphere: all the parts of the earth that support and contains life. 1.4 THE BIOSPHERE