Unit 1 and Unit 2 crossword

4. a sediment of mud
6. rock is changing all the time, from one type to another, it is called the .... .....
7. is a mixture of minerals
8. hard outer of Earth is cracked into huge slabs are called
9. is a mixture of clay, sand, routing vegetation
10. it is mainly calcite
11. in ........ weathering the rock gets brocken into bits,but minerals in it do not change
14. the most common mineral
16. this rock has been changed undeground, without melting
18. something that occurs naturally (term)
19. it is mainly quartz

1. this rock forms when it melts, than cools and hardens
2. soil provides ......... rhat plants need
3. these area can not afford the infrastructure, to bring fresh water to everyone
5. it has 3 colours
6. resource that we can keep on using, and it will not run out
12. it is a thin layer of rotting vegetation such as grass and leaves
13. in which country is Sahel
15. weathers quickly to produce clay
16. it is a natural compound
17. world`s largest aquafer