The Earth and Atmosphere Crossword Puzzle
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QUESTIONS LIST:
- atmosphere : the gas layer that surrounds the earth
- oxygen : the useful gas that we breathe
- nitrogen : the gas that is most common in the atmosphere
- crust : the outer layer of the earths composition
- sedimentary : soft rock that fossils can be found in
- metamorphic : rock that is created under heat and pressure (marble)
- igneous : rock that is made when magma cools
- fossil : the remains of a creature that lived millions of years ago
- carbon dioxide : the gas that humans breathe out
- acid rain : something that can cause damage to statues and rock
- rock cycle : the process by which a rock can change from one type to another
