Unit 2 Techtonics

Question 1

What is focus?

Answer 1

The exact spot (below the surface of the earth) where an earthquake occurs

Question 2

What is Pyroclastic?

Answer 2

Material “exploded” from volcanoes

Question 3

What is Fumarole?

Answer 3

A “steam” hole, steam geyser

Question 4

What is thermal expansion?

Answer 4

Weathering due to the expansion and contraction of rock in different temperatures.

Question 5

Chemical weathering is.

Answer 5

Weathering due to solution, oxidation and hydrolysis

Question 6

Mass wasting

Answer 6

Downward movement of soil, rock, etc. Due to gravity

Question 7

Slump is

Answer 7

Downward slipping of a mass moving as a unit along a curved surface

Question 8

Lahar is

Answer 8

Mudflow created by the melting of ice and snow due to volcanism

Question 9

Creep (soil creep) is

Answer 9

Slow gradual movement of soil caused by thermal expansion

Question 10

A dyke is

Answer 10

Thin vertical veins of igneous rock that form in the fractures found within the crust

Question 11

Graben is

Answer 11

Movement of plates on either side of fault cause drop of large blocks of rock

Question 12

Three ways steam erosion occurs

Answer 12

Lifting of loosely held materials (salt, sand, clay particles), abrasion (particles suspended in water rubbing on rocks), solution activity (chemical weathering)

Question 13

What best describes what happens to an old River, versus a young or mature river?

Answer 13

Why floodplain, valleys form an ox bow lakes form

Question 14

What is a volcanic pipe?

Answer 14

When it Dyke reaches the surface of the earth

Question 15

The rock cycle have three rock classes, they are:

Answer 15

Igneous, sedimentary, and metamorphic

Question 16

What are the three most common elements in the earths crust?

Answer 16

Oxygen, silicon an aluminum

Question 17

Lithification is

Answer 17

The process of compacting and cementing of sediments