Rocks Flashcards
Like water, rocks are part of what?
A cycle.
What are the types of rock?
- Igneous rock 2. Sedimentary Rock 3. Metamorphic rock
Different rocks give what that is valuable to us?
Different minerals
All rocks start out as what?
Molten rock beneath the earth’s surface.
Cooled molten rock is what?
Igneous rock
All rocks come from what type?
Igneous rock
Give an example of igneous rock.
Pumice
What is igneous formed beneath earth’s crust?
Intrusive Igneous rock.
What is igneous rock that is formed above earth’s crust?
Extrusive igneous rock.
What is intrusive igneous rock like?
Large crystals, course texture.
Why is intrusive igneous rock coarse?
Crystals have a long time to form as the magma cools slowly.
What is extrusive igneous rock like?
Small crystals, fine texture.
Why does extrusive igneous rock have a fine texture?
It cools quickly, crystals do not have time to grow.
Give and example of extrusive igneous rock.
Basalt.
What metallic minerals does igneous rock contain?
Nickel, copper, gold and silver.