Spheres of Earth Flashcards
1
Q
What are the 4 spheres of Earth?
A
Lithosphere, Hydrosphere, Atmosphere, Biosphere
2
Q
What are the names originating from?
A
- litho (stone)
- water (hydro)
- air (atmo)
- life (bio)
3
Q
What is the Lithosphere?
A
- it is the outer solid part of Earth
- 100 km thick
- covers entire surface of Earth
- made up of minerals rich in iron and magnesium
4
Q
What is the Hydrosphere?
A
- composed of water on or near Earth
- includes the ocean, rivers, and lakes
- 97% is in the oceans and the remaining 2.5% is fresh water
5
Q
What is the Atmosphere?
A
- it is the envelope of gas surrounding Earth
- contains gases such as nitrogen, hydrogen, oxygen and carbon-dioxide
