Geology Quiz Chapter 4 And 5

Front 1

Igneous rocks is formed by

Back 1

cooling of magma or lava

Front 2

Igneous rocks are classified by

Back 2

texture and color

Front 3

Intrusive or plutonic rocks cool...

Back 3

slowly

Front 4

extrusive or volcanic rocks cool....

Back 4

rapidly

Front 5

What is meant by the term texture?

Back 5

Crystal size

Front 6

What are some types of textures?

Back 6

Phaneritic, aphanitic, porphyritic, pegmatitic, and glassy

Front 7

Phaneritic is intrusive or extrusive?

Back 7

intrusive

Front 8

aphanitic is intrusive or extrusive?

Back 8

extrusive

Front 9

Mafic Composition

Back 9

Mg,Fe Dark color

Front 10

Felsic Composition

Back 10

Fe,Si light color

Front 11

Intermediate comp

Back 11

grey color

Front 12

Factors that affect crystal size

Back 12

#1 is rate of cooling

Front 13

3 components of magma

Back 13

silicate,gases, and crystals?????

Front 14

Viscosity

Back 14

Measure of resistance of magma flow

Front 15

felsic magma is more vicious because...

Back 15

it has more silica

Front 16

How does temp and gas affect viscosity?

Back 16

hotter magmas are less vicious.and more trapped gas = explosion

Front 17

Why does magma rise?

Back 17

Because its less dense than surrounding rocks.

Front 18

What is a pluton?

Back 18

Magma that solidifies within the crust

Front 19

What is a dike?

Back 19

A sheet that cuts vertically across geological layers

Front 20

What is a sill?

Back 20

A sheet that cuts horizontally across geological layers

Front 21

Why are some volcanoes more dangerous than others?

Back 21

The amount of silica and gas pressure within the volcano.

Front 22

What is a shield volcano? (Hawaii)

Back 22

eruptions are quiet, low viscosity of magma

Front 23

What is a composite volcano? (adjacent to pacific ocean)

Back 23

-Form at convergent plate boundaries

-intermediate felsic level

-erupt explosively

Front 24

What is a cinder volcano?

Back 24

Steep sided with crater on top

Front 25

What are flood basalts?

Back 25

They often cover large areas and are horizontal

Front 26

What hazards are associated with volcanoes?

Back 26

High silica cant escape, gases, and temp

Front 27

What is weathering?

Back 27

Physical breakdown and chemical alteration of earths material

Front 28

mechanical weathering

Back 28

is physically breaking rocks into smaller rocks

Front 29

chemical weathering

Back 29

chemical reactions change rocks (dissolve away)

Front 30

Sedimentary rocks and what percent of earths surface?

Back 30

products of weathering- 70%

Front 31

Process to create a sedimentary rock

Back 31

1.Weathering

2. Erosion and transport

3. Deposit of sediments

4. Lithification

Front 32

How do they transport?

Back 32

Dissolve load and suspended load

Front 33

How to identify a sedimentary rock

Back 33

Grain size, sorting, and rounding

Front 34

Breccia sedimentary rocks have

Back 34

sharp grains

Front 35

conglomerate sedimentary rocks have

Back 35

circle grains

Front 36

2 types of sedimentary rocks

Back 36

Detrial and chemical