plate tectonics

Question 1

Lithosphere

Answer 1

The lithosphere is the solid, outer part of Earth. The lithosphere includes the brittle upper portion of the mantle and the crust.

Question 2

Asthenosphere

Answer 2

The mesosphere is a layer of Earth’s atmosphere. The mesosphere is directly above the stratosphere and below the thermosphere. It extends from about 50 to 85 km (31 to 53 miles) above our planet.

Question 3

Inner Core

Answer 3

Inner Core The inner core is a hot, dense ball of (mostly) iron. It has a radius of about 1,220 kilometers (758 miles). Temperature in the inner core is about 5,200° Celsius (9,392° Fahrenheit). The pressure is nearly 3.6 million atmosphere (atm).

Question 4

Outer Core

Answer 4

Outer Core The outer core, about 2,200 kilometers (1,367 miles) thick, is mostly composed of liquid iron and nickel. The NiFe alloy of the outer core is very hot, between 4,500° and 5,500° Celsius (8,132° and 9,932° Fahrenheit)

Question 5

Seismic Waves

Answer 5

an elastic wave in the earth produced by an earthquake or other means.

Question 6

oceanic crust

Answer 6

oceanic crust, the outermost layer of Earth’s lithosphere that is found under the oceans and formed at spreading centres on oceanic ridges, which occur at divergent plate boundaries.

Question 7

Continental Crust

Answer 7

Continental crust is the layer of igneous, sedimentary, and metamorphic rocks that forms the geological continents and the areas of shallow seabed close to

Question 8

Density

Answer 8

Density is the substance’s mass per unit of volume. The symbol most often used for density is ρ although the Latin letter D can also be used.

Question 9

Alfred Wegener

Answer 9

Alfred Lothar Wegener was a German climatologist, geologist, geophysicist, meteorologist, and polar researcher.

Question 10

Continental Drift

Answer 10

Continental drift is the hypothesis that the Earth’s continents have moved over geologic time relative to each other, thus appearing to have “drifted”

Question 11

Convergent Boundary

Answer 11

A convergent boundary is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other,

Question 12

. Divergent Boundary

Answer 12

A divergent boundary occurs when two tectonic plates move away from each other

Question 13

Transform Boundary

Answer 13

A transform fault or transform boundary, is a fault along a plate boundary where the motion is predominantly horizontal. .

Question 14

Pangaea

Answer 14

From about 300-200 million years ago (late Paleozoic Era until the very late Triassic

Question 15

Laurasia

Answer 15

one of the two ancient supercontinents produced by the first split of the even larger supercontinent Pangaea about 200 million years ago,

Question 16

Gondwana

Answer 16

Gondwana was a large landmass, often referred to as a supercontinent, that formed during the late Neoproterozoic (about 550 million years ago)

Question 17

Mesosaurus

Answer 17

Stereosternum, it is a member of the family

Question 18

Glossopteris

Answer 18

Species of Glossopteris were the dominant trees of the middle- to high-latitude lowland vegetation across the supercontinent Gondwana during the Permian Period.

Question 19

Mesosphere

Answer 19

The mesosphere is a layer of Earth’s atmosphere. The mesosphere is directly above the stratosphere and below the thermosphere.

Question 20

sea-floor spreading

Answer 20

Seafloor spreading is a geologic process in which tectonic plates—large slabs of Earth’s lithosphere—split apart from each other