Across
- 2. What are plant remains changed into mineral crystals by pressure and heat?
- 5. granite, obsidian, and pumice are this type of rock (memorize this big time)
- 6. Salt ___ are an important natural resource because they possess large quantities of sulfur, crude oil, and natural gas
- 10. calcite, limestone, sandstone are examples of this type of rock (memorize this--maybe it helps to make a song or rhyme)
- 11. gneiss, marble, and slate are examples of this type of rock (you need to memorize this for the test)
- 12. Mohs scale is a measure of what?
- 13. ___lines on a relief map connect points of equal elevation
Down
- 1. The gravitational pull of the ____ on the Earth affects our weather, stabilizes the planet, and helps to release energy in the form of heat
- 3. These are rocks from which we extract metals
- 4. ___ is the second layer in the earth from the outside in
- 7. Folding and faulting have this tendency in common with volcanoes--the production of___?
- 8. ___is the kind of rock transformed from one kind into another kind
- 9. The Earth's ___ is twisted, folded, broken down and worn down by external forces, chemical and mechanical weather, and internal forces