4 Spheres

Question 1

Physical geography

Answer 1

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

Question 2

Environment

Answer 2

Our surrounding

Question 3

4 components of the Global environment

Answer 3

Atmosphere
Lithosphere
Biosphere
Hydrosphere

Question 4

Ecosystem

Answer 4

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

Question 5

Biosphere

Answer 5

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

Question 6

Hydrosphere

Answer 6

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

Question 7

Lithosphere

Answer 7

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)

Question 8

Atmosphere

Answer 8

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