Biosphere Flashcards
1
Q
What is a biosphere?
A
The part of the earth where living organisms occur
2
Q
What does the biosphere consist of?
A
Atmosphere
Lithosphere
Hydrosphere
3
Q
What is the atmosphere?
A
The layer of air that surrounds the earth
4
Q
What does the atmosphere consist of?
A
A mixture of various gases
5
Q
What two gases in the atmosphere are essential to life?
A
CO2
O2
6
Q
What is the lithosphere?
A
The soil and rocks that comprise the outer layer of the earth
7
Q
What is the hydrosphere?
A
All the water on the surface of the earth
8
Q
Where does the hydrosphere occur?
A
Oceans
Lakes
Rivers
Water vapour
9
Q
How much of the earth does the hydrosphere comprise?
A
75% of the earth’s surface is covered by water
