11.4 Notes

Question 1

Igneous rocks are formed from

Answer 1

hot molten rock

Question 2

ignis in latin means

Answer 2

fire

Question 3

rocks that forms when magma hardens beneath Earth’s surface

Answer 3

intrusive igneous rock

Question 4

the slower the magma cools the

Answer 4

larger the crystals

Question 5

when lava hardens on the Earth’s surface

Answer 5

extrusive igneous rocks

Question 6

common extrusive rock properties

Answer 6

smaller crystals, vesicular texture (air holes), no crystals at all (glassy)

Question 7

slow cooling results in the formation of ____ crystals

Answer 7

large

Question 8

coarse grained rocks

Answer 8

intrusive rocks

Question 9

rapid cooling of magma or lava results in rocks with what type of crystals

Answer 9

small, mineral crystals

Question 10

fine grained rocks

Answer 10

extrusive rocks

Question 11

results from cooling that is so fast that minerals do not have a chance to crystallize

Answer 11

glassy texture

Question 12

is glassy texture intrusive or extrusive

Answer 12

extrusive

Question 13

rock example with glassy texture

Answer 13

obsidian

Question 14

result of gas bubbles, which often occurs during volcanic eruptions

Answer 14

vesicular texture

Question 15

is vesicular texture on intrusive or extrusive rock

Answer 15

extrusive rocks

Question 16

what are vesicles

Answer 16

holes, pores, or cavities

Question 17

example of a rock with vesicular texture

Answer 17

pumice

Question 18

felsic has darker or lighter color

Answer 18

lighter color

Question 19

felsic has a higher or lower density

Answer 19

lower density

Question 20

what is felsic rock rich in

Answer 20

Silicon and Aluminum

Question 21

mafic rocks has a lighter or darker color

Answer 21

darker color

Question 22

mafic rocks have a higher or lower density

Answer 22

higher density

Question 23

mafic rocks are rich in

Answer 23

iron and magnesium

Question 24

how is basalt formed

Answer 24

extrusion (volcanic)

Question 25

what is the texture of basalt

Answer 25

fine

Question 26

what is the color of basalt

Answer 26

darker

Question 27

composition of basalt

Answer 27

iron and magnesium

Question 28

how is granite formed

Answer 28

intrusion (plutonic)

Question 29

texture of granite

Answer 29

coarse

Question 30

color of granite

Answer 30

lighter color

Question 31

composition of granite

Answer 31

silicon and aluminum

Question 32

You know it is an igneous rock if it has

Answer 32

gas pockets, if it’s glassy, or has large coarse crystals

Question 33

how do igneous rocks form

Answer 33

from the solidification of molten material (lava or magma)

Question 34

igneous rocks exhibit

Answer 34

intergrown or interlocking mineral crystals

Question 35

if an igneous rock cools fast what forms

Answer 35

small crystals

Question 36

if an igneous rock cools slowly

Answer 36

large crystals form

Question 37

mafic rocks are what color and what density

Answer 37

dark colored and high density

Question 38

felsic rocks are what color and what density

Answer 38

light colored and low density

Question 39

if an igneous rock cools extremely fast,

Answer 39

the rock will have a glassy texture like obsidian

Question 40

vesicular texture

Answer 40

gas pockets like pumice or scoria

Question 41

intrusive

Answer 41

formed below ground

Question 42

extrusive

Answer 42

formed above ground

Question 43

If I see what then it’s an igneous rock

Answer 43

crystals, if it’s glassy, or has air pockets