Module 4: Rocks

Question 1

A naturally occurring solid aggregate of one or more minerals

Answer 1

rock

Question 2

The scientific study of rocks

Answer 2

Petrology

Question 3

Formed from hardening and crystallization of magma or molten material that originates deep within the earth.

Answer 3

Igneous

Question 4

light in color

Answer 4

FELSIC

Question 5

Forms when magma makes its way to Earth’s surface as lava and then cools. The crystals are very small (fine grained) since the cooling process is fast.

Answer 5

Extrusive/Volcanic rock

Question 5

Phaneretic

Answer 5

coarse grained

Question 6

dark in color

Answer 6

MAFIC

Question 6

Aphanistic

Answer 6

fine grained

Question 7

It cools slowly beneath the Earth surface and are created by magma. These igneous rocks have very large crystals (coarse grained).

Answer 7

Intrusive/Plutonic

Question 8

It provides information about surface conditions that existed in the Earth’s past.

Answer 8

Sedimentary Rocks

Question 9

Formed from accumulation of clasts: little pieces of broken rocks and shells

Answer 9

Clastic Sedimentary rock

Question 10

Formed when dissolved minerals precipitate from a solution.

Answer 10

Chemical Sedimentary rock

Question 11

Rocks formed from the accumulation of animal debris

Answer 11

Organic

Question 12

Forms from pre-existing rocks: either metamorphic, igneous, sedimentary

Answer 12

Metamorphic

Question 13

Due to changes in pressure and temperature over large region of the crust

Answer 13

Regional

Question 14

Mainly by heat due to contact with magma

Answer 14

Contact

Question 15

Any planar arrangement of mineral grains or structural features within the rock.

Answer 15

Foliation

Question 16

Refers to the size arrangement ad grains within the rock.

Answer 16

Texture