chapter 26.2

Question 1

Define rock

Answer 1

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

Question 2

How are rocks identified?

Answer 2

• composition

- texture

Question 3

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

Answer 3

• size
• shape
• arrangement of the rocks 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 rocks form?

Answer 5

magma

Question 6

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

Answer 6

Bowen’s Reactions Series

Question 7

What are the 3 types of magma?

Answer 7

• Mafic
• Intermediate
• Felsic

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

Felsic

Question 10

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

Answer 10

continental crust

Question 11

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

Answer 11

• deep continental

- oceanic crust

Question 12

Which type of igneous rock has a course grained texture?

Answer 12

Intrusive Igneous Rock

Question 13

Which type of igneous rock has a fine grained texture?

Answer 13

Extrusive Igneous Rock

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? ( this answer was our weekly question for Tuesday)

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 sizes because of different cooling rates?

Answer 17

porphyritic

Question 18

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

Answer 18

pumice