Unit 1: The World Chapter 2: The Physical World. Our Solar System. Sun and the objects that revolve around it Center is sun (ball of burning gases) Enormous mass creates pull of gravity The planets- Largest objects. 8 Mercury, Venus, Earth, Mars are inner planets
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* Diameter at Equator is 7,930 miles. Larger than from pole to pole by less than 1%
Circumference of 24,900 miles. Largest of inner planets
7 continents- N and S America, Europe, Asia, Africa, Australia, Antarctica
Isthmus of Panama connects Americas. Sinai Peninsula connects Asia and Africa
Continental Shelf- extension of coastal plain underwater. Slope out from land about 800 miles descend to 600 ft. slope starts there. Then ocean floor.
* Water, Land and Air
70% water. Hydrosphere
30% land. Lithosphere. Earth’s Crust
Air is part of atmosphere. 70% nitrogen.
Biosphere- plants, animals, people
Mt. Everest- 29,028ft. Above sea level
Dead Sea- 1,349ft. Below sea level
Mariana Trench- 35,827ft below sea level