1. Chapter 2 Physical Geography: A Living Planet

2. I. The Earth Inside and Out
a. The earth is
the only living planet…
i. Continents – landmasses above water on earth

3. Continental Drift The Earth consists of plates that float
The theory of continental drift explains the formation of the continents

4. e. Inside the Earth
i. Core – center of the earth (iron and nickel)1.Inner
2.outer
ii. Mantle – several layers surrounding the core
iii. Crust – thin layer of rock at the earth’s surface

5. Outside the Earth Solar System
Consists of the sun and 8 known planets, Comets, Asteroids as well as other celestial bodies that orbit the sun.

6. f. Biosphere
The part of the earth where plants and animals live (atmosphere, lithosphere and hydrosphere)

7. Thin rocky surface of the earth
THE CRUST
Thin rocky surface of the earth

8. Atmosphere- a layer of gases surrounding the earth (contains oxygen, protects us from radiation, weather occurs here)
Lithosphere- Solid rock portion of the Earth ( includes crust & uppermost mantle, ocean floor, etc.)
Hydrosphere- Made up of the water elements of the Earth (oceans, seas, lakes, etc.)

9. STRUCTURE OF THE EARTH
* The earth consists of plates that float….
* The Theory of Continental Drift explains the location of the continents. (Alfred Wegner)

10. II. Bodies of Water and Landforms
a. Water covers 71% of the earth’s surface…

11. b. Hydrologic Cycle
The water on earth is continuously circulated between the atmosphere, the oceans, and the earth

12. III. Internal Forces Shaping the Earth
a.The earth’s crust consists of number of tectonic plates

13. b. tectonic plates - enormous moving pieces of the earth’s lithosphere

14. FAULT LINES
Fault – fracture in the earth’s crust where plates move past each other

15. e.Volcanoes – point in the earth’s surface where magma and/or gases escape
i.Lava – magma that has reached the earth’s surface

16. EARTHQUAKES
When tectonic plates move against or alongside one another they will stretch until they snap back into place causing an earthquake

17. i.Seismograph – a device that measures the size of the waves created by and earthquake

18. ii.Epicenter
Point directly above the focus of an earthquake on the earth’s surface
iii.Richter Scale – uses information collected by seismographs to determine the strength of an earthquake

19. iv.Tsunami
A giant wave in the ocean caused by an underwater earthquake or earthquake near the coast

20. The most active volcano and earthquake zone on earth
The Ring of Fire
The most active volcano and earthquake zone on earth

22. iii. Weathering and erosion help form soil
1.Soil Factors:
Parent Material
Relief
Organisms
Climate
Time

23. IV.External Forces Shaping the Earth
a. Weathering and erosion alter the surface of the earth
i. Weathering – physical and chemical processes that change the characteristics of rock on or near the earth’s surface

24. ii. Erosion
Occurs when weathered material is moved by the action of wind, water, ice and gravity

25. iv. Sediment - Small pieces of rock created by weathering (mud, sand or silt)
v. Mechanical Weathering – processes that break rock into smaller pieces (doesn’t change the composition of rock, but the size)
example: road construction

26. vi. Chemical Weathering – occurs when rock is changed into a new substance as a result of interaction between elements in the air or water and minerals
(example – iron rusting)

27. 2. Water, wind, and glaciers cause erosion…

28. V. Distribution of Physical Features on Earth:
i. How do plate tectonics, soil building & climate affect the location & distribution of physical features?

29. a. For the Ring of Fire, the location is due to being where the crust of the earth is very thin. This is the primary factor, plate tectonics, not climate.
b. For the Great Plains, climate & type of soil are the primary factors in the location of this region.
c. The climate of the Great Plains is Humid Continental, Semiarid and Humid Subtropical.

30. The type of soil is a major factor, in the Ring of Fire
The type of soil is a major factor, in the Ring of Fire .Volcanic soil can be very fertile, as well as the soil in the Great Plains.
D. Tropical Rainforest are located between the 23 ½ N Tropic of Cancer & 23 ½ Tropic of Capricorn, causes these areas to be quite warm and to have a lot of rain.