Chapter 3

Question 1

Crust

Answer 1

The top layer, composed almost entirely of light elements.

Lithosphere= earth’s outer layer

Question 2

Mantle

Answer 2

The layer beneath the crust that makes up 68% of Earth’s mass
Consists of- asthenosphere and mesosphere

Question 3

Asthenosphere

Answer 3

the layer beneathe the lithosphere that is a pliable, soft layer of mantle

Question 4

mesosphere

Answer 4

layer beneath the asthenosphere

Question 5

core

Answer 5

Earths innermost layer that consists of the outer core and inner core.
Outer Core= liquid nickel and iron
Inner core= solid liquid and iron

Question 6

Structure of the Earth

Answer 6

Crust, mantle, core

Question 7

Weathering

Answer 7

wears down rocks and makes them smooth as time passes

water and wind weathering do the same

Question 8

Erosion

Answer 8

transports material from chemical weathering elsewhere
water-can change landscape like gorges or cliffs
wind-rock formations

Question 9

atmospheric composition

Answer 9

nitrogen is 78% of earths atmosphere. The rest is oxygen, carbon dioxide, methane, and water vapor

Question 10

Troposphere

Answer 10

layer nearest earth’s surface where weather occurs

Question 11

stratosphere

Answer 11

the layer above the troposphere-temperature rises

Question 12

Greenhouse effect

Answer 12

greenhouse gases absorb and reradiate infrared radiation near earth

Question 13

layers of atmosphere

Answer 13

troposphere, stratosphere, ozone, mesosphere, thermosphere

Question 14

water cycle

Answer 14

condensation, evaporation, precipitation

Question 15

biosphere

Answer 15

narrow layer around earth where life can exist