Science Lesson 4: Looking through the Earth Inside

Question 1

Layer of the Earth that is a silicate solid

Answer 1

Crust

Question 2

Structure of the Earth determined by its components

Answer 2

Compositional Layers

Question 3

Viscous liquid

Answer 3

Outer Core

Question 4

Thicker & lighter; “floats” over the oceanic crust

Answer 4

Continental Crust

Question 5

How thick is the Earth’s mantle?

Answer 5

2,900km

Question 6

Layer of the Earth that composes 67% of Earth’s total mass

Answer 6

Mantle

Question 7

Viscous Solid Rock

Answer 7

Mantle

Question 8

Dense Solid

Answer 8

Inner Core

Question 9

It is the outermost layer of the Earth.

Answer 9

Crust

Question 10

Dense & thin; under the ocean basins

Answer 10

Oceanic Crust

Question 11

Ultramafic rock that consists of iron and magnesium

Answer 11

Peroditite

Question 12

Heat from core travels through atoms by rapid collision

Answer 12

Conduction

Question 13

Caused by heat currents that freely move

Answer 13

Convection

Question 14

Generated by convection’s process of Cooling

Answer 14

Convection Cells

Question 15

responsible for the movement of the crust

Answer 15

Convection Cells

Question 16

Inner part of the Earth; first created during Earth’s early years

Answer 16

Core

Question 17

Structure of the Earth determined by its physical properties

Answer 17

Mechanical Layers

Question 18

Core’s heat is due to _____

Answer 18

Radioactive Decay

Question 19

The core makes up __% of Earth’s composition

Answer 19

31%

Question 20

Mechanical layer below Lithosphere and Asthenosphere, above the core

Answer 20

Mesosphere

Question 21

Uppermost soldi part of the mantle and crust

Answer 21

Lithosphere

Question 22

Main source of magma; layer below lithospheric plates

Answer 22

Asthenosphere

Question 23

Referred to as the “core” or whole interior of the Earth

Answer 23

Barysphere

Question 24

A sudden change in seismic velocities across a boundary

Answer 24

Seismic Discontinuity

Question 25

Seismic discontinuity that separates the core from the mantle

Answer 25

Gutenberg’s Discontinuity

Question 26

In Gutenberg’s discontinuity, P-waves ______ velocity, whereas S-waves _______.

Answer 26

increase, disappear

Question 27

Type of discontinuity between the crust and the mantle

Answer 27

Mohorovich/”Moho” Discontinuity

Question 28

Also known as the “border” between upper and lower continental crust; discontinuity between the hydrosphere and crust

Answer 28

Conrad Discontinuity

Question 29

He is well-known to seismologists. He worked in the Manila Observatory at Padre Faura Street.

Answer 29

William C. Repetti S.J.

Question 30

Seismic Discontinuity between the upper and lower core

Answer 30

Lehmann Discontinuity