Parts Of The Earth

Question 0

What makes waves change path

Answer 0

Contact with land

Question 1

vibrations that travel through earth carrying the energy released during an earthquake

Answer 1

Seismic waves

Question 2

Three ways geologists learn about the earths interior

Answer 2

Core samples
Study rocks pushed to the surface
Lab experiments

Question 3

A force pressing on an area

Answer 3

Pressure

Question 4

The three layers of the earth

Answer 4

Crust, core, mantle

Question 5

Does pressure increase or decrease as you go deeper into the earth

Answer 5

Increase

Question 6

Does temperature increase or decrease as you go deeper into the earth

Answer 6

Increase

Question 7

Name the thickness, composition and state of the earths crust

Answer 7

Thickness 0-100 km
Composition
State - solid

Question 8

Name the thickness, composition and state of the earths mantle

Answer 8

Thickness - 3000 km
Composition -
State - solid

Question 9

Name the thickness, composition and state of the earths outer core

Answer 9

Thickness 2258 km
Composition - iron and nickel
State - liquid

Question 10

Name the thickness, composition and state of the earths inner core

Answer 10

Thickness - 1222 km
Composition - iron and nickel
State - solid

Question 11

A rigid layer made up of the uppermost part of the mantle and the crust

Answer 11

Lithosphere

Question 12

The soft layer of the mantle on which the lithosphere floats

Answer 12

Asthenosphere

Question 13

How does the core affect the magnetic field

Answer 13

Movement of the core creates the magnetic field

Question 14

Uses a computer to turn seismic movements into 3d images

Answer 14

Seismic tomography

Question 15

Process by which molten material adds new oceanic crust to the ocean floor

Answer 15

Sea floor spreading

Question 16

Explain movement of sea floor spreading

Answer 16

Older strips of rock move outward from either side as new molten material erupts and hardens

Question 17

Give three sources of evidence for sea floor spreading

Answer 17

Pillow lava
Magnetic stripes
Drilling samples

Question 18

The process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent plate boundary

Answer 18

Subduction

Question 19

How is the ocean floor renewed? How long does it take?

Answer 19

Time for rock to form at the ridge, get pushed out and sink into a trench

200 million years

Question 20

Will an ocean with many trenches grow or shrink

Answer 20

Shrink

Question 21

A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust

Answer 21

Plates

Question 22

A plate boundary where two plates move away from each other

Creates rifts/volcanoes

Answer 22

Divergent boundary

Question 23

A plate boundary where two plates move toward each other

Creates mountains

Answer 23

Convergent boundaries

Question 24

A plate boundary where two plates move past each other in opposite directions

Creates earthquakes

Answer 24

Transform boundary

Question 25

The theory that pieces of earth’s lithosphere are in constant motion, driven by convection currents in the mantle

Answer 25

Plate tectonics

Question 26

The transfer of thermal energy by the movement of a fluid

Answer 26

Convection

Question 27

The shaking that results from the movement of rock beneath earth’s surface

Answer 27

Earthquake

Question 28

The point beneath earth’s surface where rock first breaks under stress and causes an earthquake

Answer 28

Focus

Question 29

The point on earth’s surface directly above an earthquakes focus

Answer 29

Epicenter