CH 26.2

Question 1

define rock

Answer 1

A rock is a naturally formed mixture containing minerals, rock fragments, and
volcanic glass.

Question 2

how are rocks identified?

Answer 2

Rocks are identified by their composition and texture.

Question 3

what does the texture of a rock describe a rock?

Answer 3

The texture of a rock describes the size, shape, and arrangement of the rock’s
components.

Question 4

where do intrusive igneous rocks form?

Answer 4

within Earth’s crust are called intrusive igneous rocks.

Question 5

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

Answer 5

magma might cause partial melting of the rock it

intrudes.

Question 6

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

Question 7

what are the 3 types of magma?

Answer 7

falcic
mafic
intermediate

Question 8

which magma type has a low silica content?

Answer 8

mafic

Question 9

which magma type has a high silica content?

Answer 9

falcic

Question 10

which type o crust has an abundant amount of quartz?

Answer 10

Igneous rocks with abundant quartz generally are associated with continental
crust.

Question 11

which type of crust has little to no quartz?

Answer 11

Those with little or no quartz generally are associated with deep locations in
continental crust or with oceanic crust.

Question 12

which type of igneous rock has a coarse grained texture?

Answer 12

Intrusive igneous rocks

Question 13

which type of igneous rock has a fine grained texture?

Answer 13

Extrusive

Question 14

do fine grained rocks cool slowly or quickly?

Answer 14

quickly

Question 15

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

Question 16

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

Question 17

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

Question 18

what type of rock has vesicular (holey) texture?