MINERALS & ROCKS

Question 1

when hot magma crystallizes

Answer 1

IGNEOUS ROCKS

Question 2

magma may cool very slowly. may take over several thousand or million years until it solidifies.

Answer 2

INTRUSIVE OR PLUTONIC

Question 3

magma is expelled from volcanic craters and fissure — “Lava”. cools and solidifies almost instantaneously upon exposure to atmosphere.

Answer 3

EXTRUSIVE OR VOLCANIC

Question 4

formed from sediments that are weathered or organisms remains. fromed from deposits.

Answer 4

SEDIMENTARY

Question 5

organism remains

Answer 5

BIOLOGICAL SEDIMENTARY

Question 6

clast of weathered rocks

Answer 6

CLASTIC SEDIMENTARY

Question 7

shale, siltstone, sandstone, conglomerate

Answer 7

CLASTIC SEDIMENTARY

Question 8

has been substantially changed from their earlier form.

Answer 8

METAMORPHIC ROCKS

Question 9

transform rocks into denser and more compact materials

Answer 9

METAMORPHISM

Question 10

naturally occuring substances.

Answer 10

MINERALS

Question 11

approximated known mineral species

Answer 11

5000

Question 12

ROCK-FORMING MINERALS

Answer 12

feldspar, amphiboles, pyroxenes

Question 13

offer valuable information about a rock’s geological age and history.

Answer 13

ACCESSORY MINERALS

Question 14

minerals are primarily composed of

Answer 14

OXYGEN, SILICON, MAGNESIUM, ALUMINUM, IRON, CAL, SOD, POTASSIUM