1. Earth’s Four “Geo-spheres”

2. LITHOSPHERE Solid, rocky crust covering entire planet.

3. The air surrounding Earth
ATMOSPHERE
The air surrounding Earth
79% Nitrogen
Just under 21% Oxygen
Some carbon dioxide & other gasses

4. HYDROSPHERE
All the water in or near the Earth

5. BIOSPHERE Composed of all living organisms Plants Animals
One-celled organisms

6. Continents & Oceans C B A D Water covers 70% of Earth’s surface
Continents: largest areas of land on the planet A B C D

7. Bodies of Water Oceans Lakes, Rivers & Streams
4 major: Atlantic, Pacific, Indian and Arctic
Helps distribute Earth’s heat
Lakes, Rivers & Streams
Lakes hold 95% of our fresh water
Lake Baikal in Russia is the largest
Rivers and streams flow into larger bodies of water

8. Hydrologic Cycle
Continuous cycle of water between the atmosphere, oceans and earth

10. Continental Drift
Earth had once been a “supercontinent” (Pangaea) that divided and slowly drifted apart over millions of years
How do they know this?

11. ROCKS!
Scientists discovered that the youngest rocks in the seafloor were in the middle of the ocean
This indicates that new sea floor was forming, which would push continents apart

12. Plate Tectonics Explained

14. Reference pg. 38
Draw & label
Name the motion
Give a specific example & result (ocean, mountains, etc.)

15. Earthquakes and Volcanoes, Oh My!
Violent movement of earth as plates grind or slip past each other
Epicenter- point on earth’s surface that corresponds to the center of an earthquake
Occurs at a fault
Measured by a seismograph & the Richter Scale
Can cause tsunamis (giant waves)

16. Japan Tsunami- 2004
Locate Japan

17. Earthquakes and Volcanoes, Oh My!
Magma, gases & water from below the earth’s crust erupt and pour out of earth’s surface
Unpredictable
Most located around the Ring of Fire in the Pacific Ocean
Label the Pacific Ocean

18. Please Mark the Ring of Fire on your New Map