Biosphere Flashcards
1
Q
Define biosphere
A
The part of the earth that sustains life and contains all living organisms
2
Q
define atmosphere
A
The layer of air above and surrounding the earth that contains a mixture of atmospheric gasses
3
Q
define hydrosphere
A
The liquid water component of earth
4
Q
Define lithosphere
A
Outer layer of the earths surface that contains soil and rocks in the top layer of the earths surface
5
Q
Percentages of atmospheric gasses?
A
78 nitrogen
21 oxygen
0.04 C02
0.96 other inc. water vapour
6
Q
functions of Atmosphere
A
- protects from UV rays
- provides CO2 and O2 for photosynthesis and respiration
7
Q
functions of hydrosphere
A
- important component for all living organisms
- habitat for many organisms
- freshwater
- saltwater
8
Q
functions of lithosphere
A
- Habitat for soil organisms
- Provides minerals
- Anchor for plant roots
