geography

2. what the taj mahal is made of
6. the matter from which a thing is or can be made
8. the envelope of gases surrounding the earth or another planet.
9. natural substance composed of solid crystals of different minerals that have been fused together into a solid lump.
10. all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.
12. a bright green precious stone consisting of a chromium-rich variety of beryl.
13. any of the almost spherical concentric regions of matter that make up the earth

1. the basic unit of a chemical element
3. a living organism that feeds on organic matter, typically having specialized sense organs and nervous system and able to respond rapidly to stimuli.
4. the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.
5. material substance that constitutes the observable universe
7. study of rocks
11. a precious stone consisting of a clear and colorless crystalline form of pure carbon, the hardest naturally occurring substance.