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Rock Formation: Origins and Types

Explore the classification of rocks by geologists based on their origins and characteristics. Learn about sedimentary, metamorphic, and igneous rocks and the processes involved in their formation.

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Rock Formation: Origins and Types

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  1. T or F - Metamorphic rocks are formed deep in the crust.

  2. True

  3. Type of rock formed by particles being pressed and cemented together.

  4. sedimentary

  5. Geologist classify a rock according to its ...

  6. origin

  7. Rocks without crystal grains cooled very .....

  8. quickly

  9. Name the sedimentary rock made from sand.

  10. sandstone

  11. Particles of minerals and other rocks that make up a rock. They may be fine or coarse.

  12. grains

  13. The Earth's crust is made of ...

  14. rock

  15. T or F - Most rocks cannot be identified by color alone.

  16. True

  17. Formed when other rocks are changed by heat and pressure.

  18. metamorphic rock

  19. Forms outside the Earth’s crust.

  20. Extrusive rock

  21. Type of rock that forms from the cooling of lava and magma.

  22. igneous rock

  23. Geologists classify rocks into how many groups?

  24. 3

  25. If a rock is coarse-grained, what size are its grains?

  26. large

  27. About 20 minerals make up most rocks. What are these minerals known as?

  28. Rock-forming minerals

  29. Which do geologists NOT observe when studying a rock sample?

  30. streak

  31. Type of rock that forms inside the Earth’s crust.

  32. intrusive

  33. What organic matter might a sedimentary rock contain?

  34. Plant and animal parts.

  35. What is it called when sediments are pressed and squeezed together?

  36. compaction

  37. What is it called when sediments are cemented or glued together?

  38. cementation

  39. Wind is one way sediments are moved. Name 2 more ways.

  40. running water ice

  41. Shale has very fine grains. It is formed from _____.

  42. clay

  43. Used for building because it is easy to cut.

  44. sandstone limestone

  45. Mechanical weathering is one way rocks are broken. Name another.

  46. chemical weathering

  47. What is the 3rd type of sedimentary rocks? 1.Organic 2. Clastic 3.________

  48. chemical

  49. When a metamorphic rock forms from sandstone, what is it called?

  50. quartzite

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