4 Spheres Flashcards
1
Q
Physical geography
A
About physical elements of the world: landforms, soils, rivers, air masses, etc.
2
Q
Environment
A
Our surrounding
3
Q
4 components of the Global environment
A
Atmosphere
Lithosphere
Biosphere
Hydrosphere
4
Q
Ecosystem
A
Biological community formed by the interaction of living things n a particular environment with one another and their habitat
5
Q
Biosphere
A
Composed of all living organisms
( plants, animals, single cell organisms)
Evolved 3.5 billion yrs ago
6
Q
Hydrosphere
A
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
Q
Lithosphere
A
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
Q
Atmosphere
A
Layer surrounding earth 79%nitrogen 21% oxygen Small amount is carbon dioxide Protects organisms from UV rays Absorbs energy from sun, acts like insulator
