Rocks Flashcards
1
Q
Q: How do extrusive and intrusive igneous rocks form?
A
A: Extrusive cools fast on the surface (e.g., basalt), intrusive cools slowly underground (e.g., granite).
2
Q
Q: What is weathering?
A
A: Weathering is when rocks break into smaller pieces.
3
Q
Q: What are the steps in the formation of clastic sedimentary rocks?
A
A: 1) Weathering, 2) Erosion, 3) Deposition, 4) Compaction and cementation.
4
Q
Q: What are chemical and organic sedimentary rocks?
A
A: Chemical rocks form from evaporated water (e.g., limestone), organic rocks form from dead plants/animals (e.g., coal).
5
Q
Q: How do metamorphic rocks form?
A
A: Metamorphic rocks form from heat and pressure (e.g., marble from limestone).
