Lesson 4: Earth's Subsystems

Question 1

the earth is sometimes called

Answer 1

water planet and blue planet

Question 2

why is the Earth also called the water planet and blue planet

Answer 2

because the seas cover more than two-thirds of its surface

Question 3

the gaseous layer above the Earth’s surface primarily composed of different gases such as nitrogen and oxygen.

Answer 3

atmosphere

Question 4

the zone of the Earth where all forms of life exist. This serves as the ecosystem of all living and non- living organisms

Answer 4

biosphere

Question 5

the solid part of the Earth that consists the entire planet from
the center of the core to the outer crust.

Answer 5

geosphere/lithosphere

Question 6

layers of the earth includes

Answer 6

crust, mantle, and core

Question 7

the water part of the Earth that includes oceans and glaciers

Answer 7

hydrosphere

Question 8

the atmosphere is composed of

Answer 8

78% nitrogen and 21% oxygen

Question 9

what are the other gases in the 1% of gases in the atmosphere

Answer 9

argon, carbon dioxide, carbon monoxide, ozone, and other inert gases

Question 10

how does the atmosphere support life

Answer 10

because animals and plant need oxygen and carbon dioxide

Question 11

how does the atmosphere support life indirectly?

Answer 11

by regulating climate as it acts as a blanket and filter, retaining heat at night and shielding direct solar radiation during the day

Question 12

the zone of Earth where all forms of life exist: in the sea, on land,
and in water

Answer 12

biosphere

Question 13

biosphere is sometimes called as

Answer 13

the large ecosystem

Question 14

it is a very thin layer of the earth’s surface

Answer 14

biosphere

Question 15

the solid Earth, consisting of the entire planet from the center of
the core to the outer crust

Answer 15

geosphere

Question 16

the water part of the Earth which circulates among oceans,
continents, glaciers, and atmosphere.

Answer 16

hydrosphere

Question 17

percentage of oceans in Earth

Answer 17

cover 71% of Earth and contain 97.5% of its water

Question 18

____ and ___ flow through Earth’s spheres: geosphere, hydrosphere, atmosphere, and biosphere

Answer 18

energy and matter

Question 19

how does energy flow through the atmosphere

Answer 19

convection

Question 20

How does matter and energy flow
across the four subsystems of the Earth?

Answer 20

The atmosphere provides the geosphere with heat and energy needed for rock breakdown and erosion. The biosphere receives gases, heat, and sunlight (energy) from the atmosphere. It receives water from the hydrosphere and a living medium from the geosphere.