9/14/10BR: If I were to start digging and went straight through the Earth where would I end up? What problems might I have if I tried this?

Today:The Earth’s Layers, Axis, Plate Tectonics-Personal Folder-MIKVA- “A” Essay Due Wednesday

Daily Notes 9/14/10 -

• Earth Layers

• Earth Stats

• Earth Orbit/Axis/Seasons

Summary:Questions:

Earth’s Layers

• The Earth is made of 3 layers- crust, mantle, and core

• The circumference of the earth at the equator is 24,901.55 miles

• The earth through the poles the circumference is a bit shorter - 24,859.82 miles

• Equatorial bulge caused by Earth’s spin and sun/moon’s gravity

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 fusion nuclear reaction- it powers the whole system

• The Earth’s magnetosphere protects us from the sun’s deadly radiation

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.”

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

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