Crossword Puzzle

3. The place, people, things and nature that surround any living organism
4. Igneous rocks are also called as _____________________ rocks
5. Molten magma on the surface of the earth
9. The remains of the dead plants and animals trapped in the layers of rocks
12. Made of silica and alumina
13. The thin layer of air that surrounds the earth
14. Changes into slate
15. Plant and animal kingdom together make ______________________
16. A type of rock that contains dead remains of plants animals and other micro-organisms
18. The thinnest layer of the earth
19. The system in which goods are exchanged without the use of money

1. Igneous rocks formed inside the earth's crust are called _______________ igneous rocks
2. The domain of water
6. The world of non-living elements
7. The hard top layer of the earth
8. A rock made from grains of sand
10. Made of silica and magnesium
11. The innermost layer of the earth
12. The small fragments or particles of rocks
17. Made up of nickel and iron