Rocks

Question 1

Rock

Answer 1

Aggregate of one or more minerals or mineraloids

Question 2

3 major types of rocks

Answer 2

Igneous, metamorphic and sedimentary

Question 3

Rock transformation

Answer 3

Weathering, metamorphism, melting and recrystallization

Question 4

Igneous rock

Answer 4

Comes from a cooling melt of lava

Question 5

2 types of igneous rocks

Answer 5

Intrusive (inside the earth), extrusive (outside the earth)

Question 6

Texture of igneous rocks

Answer 6

Pegmatitic: crystals larger than 30mm
Phaneritic: 1-30mm
Aphanitic: smaller than 1mm
Porohyritic: combination of phaneritic and aphanitic
Glassy
Vesicular: tiny mini holes
Pyroclastic: broken volcanic

Question 7

Sedimentary rocks:

Answer 7

Lithification (3 steps): compaction, dewatering and cementation

Question 8

3 types of sedimentary rocks

Answer 8

Clastic (pieces of other rocks), chemical and organic (from living things)

Question 9

Allocthonous

Answer 9

Moved

Question 10

Autochthonous

Answer 10

In place

Question 11

Metamorphic rocks

Answer 11

Formed when another rock is exposed to heat or pressure

Question 12

Texture of a metamorphic rock

Answer 12

Foliated or non-foliated

Question 13

Classification of metamorphic rocks (3)

Answer 13

Regional (f), contact (n-f), dynamic (both)

Question 14

Regional metamorphic rocks

Answer 14

Formed by heat and pressure, foliated

Question 15

Contact metamorphic rocks

Answer 15

Magma bakes surrounding rocks (marble)

Question 16

Dynamic metamorphic rocks

Answer 16

Large amounts of pressure