1-3

Question 1

the thin and solid outermost layer of the earth above the mantle

Answer 1

crust

Question 2

the layer of rock between the earths crust and core

Answer 2

mantle

Question 3

the central part of the earth below the mantle

Answer 3

core

Question 4

the solid, outer layer of the earth that consists of the crust and the rigid upper part of the mantle

Answer 4

lithosphere

Question 5

the soft layer of the mantle on which the tectonic plates move

Answer 5

asthenosphere

Question 6

the strong, lower part of the mantle between the asthenosphere and the outer core

Answer 6

mesosphere

Question 7

a block of lithosphere that consists of the crust and the rigid, outermost part of the mantle

Answer 7

tectonic plate

Question 8

the hypopthesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations

Answer 8

continental drift

Question 9

the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies

Answer 9

sea-floor spreading

Question 10

a substance made up of atoms with two or more atoms joined by chemical bonds

Answer 10

compound

Question 11

an instrument that records vibrations in the ground and determines the location and strength of an earthquake

Answer 11

seismograph

Question 12

a wave of energy that travels through the earth and away from an earthquake in all directions

Answer 12

seismic waves

Question 13

pangaea existed 245 million years ago and was one huge continent

Answer 13

pangaea

Question 14

they are placed where sea floor spreading takes place

Answer 14

mid ocean ridge

Question 15

when earths magnetic poles change places

Answer 15

magnetic reversal

Question 16

the remains or physical evidence of an organism preserved by geological processes

Answer 16

fossils