Rocks And Denudation Flashcards
1
Q
What are the three major rock groups? Give one example for each.
A
Igneous-Granite
Sedimentary-Coal
Metamorphic-Marble
2
Q
How are igneous rocks formed?
A
When magma or lava cools down and soldifies.
3
Q
How are sedimentary rocks formed?
A
When the remains of plants, animals, sea creatures and rock fragments build up in layers. They compress and cement together overtime to form a rock.
4
Q
How are metamorphic rocks formed?
A
When igneous or sedimentary rocks come under great heat (from molten magma) or pressure (from folding) and change in shape or form.
5
Q
When does mechanical weathering occur?
A
When rocks are broken into smaller pieces.
6
Q
Give an example of mechanical weathering.
A
Freeze-thaw action.
7
Q
Give an example of chemical weathering
A
Carbonation
