1. 9/15/11 BR: The three layers of the earth are ____, ____, and ______
9/15/11 BR: The three layers of the earth are ____, ____, and ______. Today: The Earth’s Layers, Axis, Plate Tectonics – continuing from yesterday’s notes..

2. Daily Notes 9/15/11 - Earth Layers Earth Stats
Earth Orbit/Axis/Seasons
Summary:
Questions:

3. Earth’s Layers The Earth is made of 3 layers- crust, mantle, and core
The circumference of the earth at the equator is 24, miles
The earth through the poles the circumference is a bit shorter - 24, miles
Equatorial bulge caused by Earth’s spin and sun/moon’s gravity

8. Earth Stats 93 million miles from sun
While we're hurtling through space at nearly 67,000 mph, we're also spinning around in circles at over 1000 mph!
The Sun is a fission nuclear reaction- it powers the whole system
The Earth’s magnetosphere protects us from the sun’s deadly radiation

12. Earth Orbit
It takes the Earth 1 year to go around the sun. The path the Earth takes around the sun is called the Earth’s “Orbit.”

13. Earth’s Axis -Earth is divided into hemispheres- equator divides N & S, while Prime Meridian divides E&W.

14. Earth’s Axis- 23.5° - causes seasons- the uneven distribution of heat causes ocean currents and the weather