Lesson 2 Earth and Earth Systems

Question 1

exchange of energy but negligible exchange of mass with surroundings

Answer 1

closed system

Question 2

blanket of air that surrounds the earth

Answer 2

atmosphere

Question 3

outermost region of atmosphere

Answer 3

exosphere

Question 4

primary composition of atmosphere

Answer 4

nitrogen 78%
oxygen 21%
carbon dioxide
water vapour

Question 5

constitutes climate system maintains condition suitable for life

Answer 5

troposphere (0-10km)

Question 6

contains ozone that protects life on planet by filtering uv from sun

Answer 6

stratosphere (10-50km)

Question 7

life zone of earth

Answer 7

biosphere

Question 8

the biosphere is structured into a hierarchy known as

Answer 8

food chain

Question 9

contains all water found on our planet

Answer 9

hydrosphere

Question 10

how many percent of water is fresh and how much came from glacial ice

Answer 10

3%
70%

Question 11

solid earth that includes the continental and ocean crust

Answer 11

geosphere

Question 12

percentage of composition of oxygen silicon and magnesium

Answer 12

94%

Question 13

primarily silica plus light metallic elements

Answer 13

crust

Question 14

primarily silica plus iron n magnesium and is solid

Answer 14

mantle/mesosphere

Question 15

primarily iron and nickel

Answer 15

core

Question 16

brittle solid

Answer 16

lithosphere

Question 17

solid but nearly liquid

Answer 17

asthenosphere

Question 18

liquid

Answer 18

outer core

Question 19

solid

Answer 19

inner core