Question

can someone check my answers?
1) which of the following statement about igneous rocks is correct? A. intrusive igneous rocks are formed when magma is cooled above the ground.
b. extrustive igneous rocks are formed when magma is cooled above the ground.
c. extrusive igneous rocks are formed when magma is cooled below the ground. ****
d. both intrusive and extrusive igneous rocks are formed below the ground.
2. slow cooling magma or lava often results in the formation of
A. glassy texture rock. *
b.porphyritic texture rock.
c. coarse grained texture rock.
d.fine grained texture rock.

Answer 1

3. as the rate of cooling igneous rocks increases, the size of the crystals that form
A. decreases
b. increases
c. is not affected **
d. cannot be determined

Answer 2

Extrusive Rocks forms when magma comes out of a volcano and cools. Intrusive is when Magma cools below the surface of the earth, intruding into host rock.

Answer 3

2. Phaneritic (phaner = visible, so this would be a coarse grained rock) textures are typical of intrusive igneous rocks, these rocks crystallized slowly below Earth's surface.

3. As magma cools slowly the minerals have time to grow and form large crystals. If it cools faster, it does not have time to form large crystals. Hope this helps. All of your answers need corrections.