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Across 1. the thin shell of the earth. 2. make up of rocks that become softer the deeper underneath the surface of the Earth they are. 6. another word that means/ environment. 8. the mantle, the crust and the soil that covers most of the land and much of the seabed. 13. the centre of the Earth . 15. formation of water drops to form dew, rain, snow or hail. 16. the shocks that follow earthquakes can be used to study the internal structure of the Earth. 17. the compounds and solid elements in the Earth’s crust. 18. the mixture of gases that makes up the layer of air around the Earth.

Down 1. the shape of the internal layers of the Earth. 3. the Earth as a system can be divided into four ___. 4. includes all living plants and animals and their interaction with rocks, soil, air and water. 5. the earth can be divided into four of these. 6. consists of all the water on Earth in all its forms. 7. the solid rock and soil on and below the Earth’s surface . 9. process in which water of the hydrosphere turns into water vapour. 10. makes up most of the Earth’s shell. 11. the underground level below which the soil is saturated with water. 12. water stored in the soil and cavities underground. 14. one of the main metals, together with magnesium, found in the mantle. 15. the thickest layer of the Earth.