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Geography 11: 5 Themes And 4 Spheres > 4 Spheres > Flashcards

Flashcards in 4 Spheres Deck (8)
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1

Physical geography

About physical elements of the world: landforms, soils, rivers, air masses, etc.

2

Environment

Our surrounding

3

4 components of the Global environment

Atmosphere
Lithosphere
Biosphere
Hydrosphere

4

Ecosystem

Biological community formed by the interaction of living things n a particular environment with one another and their habitat

5

Biosphere

Composed of all living organisms
( plants, animals, single cell organisms)
Evolved 3.5 billion yrs ago

6

Hydrosphere

All water in the world
Solid/liquid/gas
97% earths water is ocean
3% fresh water
3/4 fresh water frozen in ice sheets

7

Lithosphere

Outer layer of earths crust
Composed of soil and rock
Composed of inorganic minerals
Can change with movement of plates (volcanoes, earthquakes, continental drift, mountain-building)

8

Atmosphere

Layer surrounding earth
79%nitrogen
21% oxygen
Small amount is carbon dioxide
Protects organisms from UV rays
Absorbs energy from sun, acts like insulator