THEME 2 Flashcards
(10 cards)
Q: What are the three main types of roches?
A: Igneous (ignées), Sedimentary (sédimentaires), and Metamorphic (métamorphiques).
Q: How is roche ignée formed?
A: When magma cools and hardens.
Q: How is roche sédimentaire formed?
A: From layers of sédiments pressed and cemented together.
Q: How is roche métamorphique formed?
A: When other roches are changed by heat and pressure.
Q: What is an intrusive igneous roche?
A: Roche that cools slowly inside the Earth (e.g., granite).
Q: What is an extrusive igneous roche?
A: Roche that cools quickly on the Earth’s surface (e.g., obsidian).
Q: What is a feature of roches ignées intrusives?
A: Large cristaux.
Q: What is a feature of roches ignées extrusives?
A: Smooth texture, may have holes from gas.
Q: What materials form roches sédimentaires?
A: Rock pieces, plant remains, and animal remains.
Q: What is compaction?
A: When layers are pressed down by weight.
