chapter 26.2

Question 1

Define rock

Answer 1

a naturally formed mixture containing minerals , rock fragment, volcanic glass.

Question 2

how are rocks identified?

Answer 2

by their composition and texture

Question 3

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

Answer 3

size
shape
arrangement of the rock components

Question 4

where do intrusive igneous rocks form?

Answer 4

within the Earth’s crust

Question 5

what type of molten rock does intrusive igneous rock form from?

Answer 5

magma

Question 6

what is the name of the series that illustrates simultaneous crystallization of silicate minerals?

Answer 6

Bowen’s reaction series

Question 7

what are the 3 types of magma?

Answer 7

Mafic
Felsic
intermediate

Question 8

which magma type has a low silica content?

Answer 8

Mafic

Question 9

which type of magma has a high silica content?

Answer 9

felsic

Question 10

which type of crust has an abundant amount of quartz?( oceanic or continental)

Answer 10

continental

Question 11

which type of crust has little to no quartz? (oceanic or continental)

Answer 11

oceanic

deep continental

Question 12

which type of igneous rock has a coarse grain texture?

Answer 12

intrusive igneous rock

Question 13

which type of igneous rock has a fine grained texture?

Answer 13

extrusive because cools quicker

Question 14

Do fine grained rocks cool slowly or quickly?

Answer 14

quickly

Question 15

what are the two specific texture type for extrusive igneous rock?

Answer 15

vesicular

porphyritic

Question 16

which texture is the type with holes left behind because of rapid cooling?

Answer 16

vesicular

Question 17

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

Answer 17

porphyritic

Question 18

what type of rock has a vesicular (holey) texture?

Answer 18

pumice