chapter 26

Question 1

define rock

Question 2

how are rocks identified?

Answer 2

primarily by the minerals they contain and by their texture.

Question 3

What does the texture of a rock describe about a rock?

Answer 3

the size, shape, and arrangement of the grains

Question 4

Where do intrusive igneous rocks form?

Answer 4

when magma is trapped deep inside the Earth.

Question 5

What type of molten rock does intrusive igneous rocks form from?

Answer 5

magma

Question 6

What is the name of the series that illustrates simultaneous crystallization of sillicates minerals?

Question 7

What are 3 types of magma?

Answer 7

basaltic, andesitic, and rhyolitic

Question 8

which magma type has a low silica context?

Answer 8

mafic magmas

Question 9

which magma type has a high silica content?

Answer 9

felsic magmas

Question 10

which type of crust has little to no quartz?

Answer 10

Volcanic oceanic sands

Question 11

which type of igneous rock has a fine grained texture?

Answer 11

Extrusive igneous rocks

Question 12

do fine grained rocks cool slowly or quickly?

Answer 12

slowly

Question 13

what are the two specific texture texture types for extrusive igneous rocks?

Answer 13

phaneritic

Question 14

which texture type has holes left behind because of rapid cooling?

Question 15

which texture is the type with two different crystal sizes because of different cooling rates?

Question 16

what type of rock has a vesicular texture?

Answer 16

basalt scoria