rocks Flashcards
Q: How do extrusive igneous rocks form?
A: They form from lava that cools quickly on the Earth’s surface (e.g., basalt).
Q: How do intrusive igneous rocks form?
A: They form from magma that cools slowly beneath the Earth’s surface (e.g., granite).
Q: What is physical weathering?
A: The breakdown of rocks into smaller pieces through physical forces like wind, water, or temperature changes.
Q: What are the steps in the formation of clastic sedimentary rocks?
A: Weathering, erosion, deposition, compaction, and cementation.
Q: What is chemical weathering?
A: The breakdown of rocks through chemical reactions, such as with acid rain.
Q: What is a metamorphic rock?
A: A rock formed from the transformation of an existing rock under heat and pressure (e.g., marble from limestone).
Q: What is the rock cycle?
A: The continuous process through which rocks change from one type to another: igneous, sedimentary, and metamorphic.
