Inside The Earth

Question 0

Structural layers

Answer 0

Layers of the earth based on their physical properties temperature density and flow dense=tightly packed heavy

Lithosphere asthenosphere mesosphere outer core and inner core 5physical layers

Question 1

Compositional layers

Answer 1

Earths layers defined by what they are made of. Crust mantle and core 3 compositional layers

Question 2

Crust

Answer 2

The outermost thinnest layer of earth made of continental crust and oceanic crust.

Question 3

Continental crust

Answer 3

Thicker but less dense than oceanic crust. This layer rises above the oceanic crust.

Question 4

Oceanic crust

Answer 4

Thinner but more dense than continental crust this layer will sink below the continental crust

Question 5

Mantle

Answer 5

Layer between the crust and the core very thick layer contains most of earths mass made of iron and magnesium

Question 6

Core

Answer 6

Layer from the bottom of the mantle to the center of the earth. Made mostly of iron.

Question 7

Lithosphere

Answer 7

The outermost rigid layer rigid=stiff unable to bend made of the rust and upper part of the mantle divided into pieces called tectonic plates

Question 8

Asthenosphere

Answer 8

The soft layer of the mantle. Made of rock that moves slowly.

Question 9

Mesosphere

Answer 9

The strong lower part of the mantle goes from bottom of asthenosphere to core

Question 10

Outer core

Answer 10

The liquid that surrounds the inner core. From the bottom of the mantle to the inner core. Made of nickel and iron.

Question 11

Inner core

Answer 11

The solid dense center of the earth. Innermost layer made of iron and nickel.

Question 12

Tectonic plates

Answer 12

Pieces of the lithosphere that move on top of the asthenosphere

Question 13

Plate tectonics

Answer 13

The idea that pieces of earths lithosphere move on top of the asthenosphere. Used to explain continental drift and sea floor spreading. Three forces move the plates. Ridge push convection slab pull

Question 14

Ridge push

Answer 14

When oceanic plates slide down where the lithosphere and asthenosphere meet oceanic lithosphere is higher before it sinks below the continental lithosphere so it slides

Question 15

Convection

Answer 15

When hot earths hot material, magma, rises, then sinks when it cools the plates are dragged sideways

Question 16

Slab pull

Answer 16

When the edge of the oceanic plate sinks and pulls the rest of the tectonic plate with it happens because the oceanic lithosphere is more dense than the asthenosphere.

Question 17

Plate boundary

Answer 17

The place where tectonic plates meet or separate. Three types. Divergent convergent transform.

Question 18

Convergent boundary.

Answer 18

When two plates push against each other what happens is decide by the types of crust that meet. 3 types. Continental/continental. Continental/oceanic oceanic/oceanic

Question 19

Divergent boundary

Answer 19

When two plates move away from each other. Mid ocean ridges are the most common

Question 20

Transform boundary

Answer 20

When two plates slide past one another. Makes earthquakes.

Question 21

Subduction zone

Answer 21

An area where one tectonic plate sinks below another. Oceanic is denser so it sinks below continental

Question 22

Alfred Wegener.

Answer 22

The scientist that said the continents drifted away from each other. How he explained it

Continents fit together
Plants and animal fossils from different climates found on both sides of Atlantic Ocean
Similar types of rock found in different places
Cuts in stone from glaciers matched on different continents

Question 23

Continental drift

Answer 23

The theory that the continents drifted apart. Theory made by Alfred Wegener. He couldn’t prove how the continents moved

Question 24

Pangaea

Answer 24

The one large landmass before the continents parted.

Question 25

Sea floor spreading

Answer 25

The creation of new oceanic lithosphere when plates move apart and spread the sea floor. The oldest crust is found near the continents. Mid ocean ridges (under water mountains) are where sea floor spreading happens.

Question 26

Magnetic reversal

Answer 26

When earths magnetic poles change places. Proof of sea floor spreading.