Inside the Earth
TOC: Earths Layers
3/18/13
I. Starter:
Calculate the Speed of an object traveling 120
miles in 3 hours.
Next, calculate the time it would take the
object to get 240 miles if it traveled at that
same speed.
Show your work!!!!
Practice:
• Record all notes and demo observations in your practice
section.
The Earth is broken up into 3 main
layers
oCrust - lithosphere &
asthenosphere
oMantle – upper,
middle, & lower
oCore – inner & outer
The Crust
• Outer layer
• 5-100 km thick
• 2 types of crust
• Oceanic (very
dense, made of
basalt)
• Continental (less
dense, made of
granite)
Oceanic and Continental Crust
The Mantle
• Middle layer
• Very thick layer
The Core
• Made mostly of iron
• 1/3 of the earth’s mass
• Very hot
Earth’s Layers
• How are the earth’s
layers similar to an
egg?
• Shell=crust
• Egg white=mantle
• Yolk=core
Earth’s Layers
• How are the earth’s
layers similar to an
orange?
• Peel=crust
• orange
slices=mantle
• center=core
Earth’s Layers
• How are the earth’s
layers similar to an
apple?
• Peel=crust
• Inside of
peel=mantle
• Apple core=core
Although the Earth has 3 Main
Layers - it can be further
divided into these layers:
• Lithosphere
• Asthenosphere
• Upper Mantle
• Middle Mantle
• Lower Mantle
• Outer Core
• Inner Core
Physical Structure of the Earth
(5 Layers)
• Lithosphere- crust and upper
most solid mantle
• Asthenosphere- solid rock
that flows slowly (like hot
asphalt)- Convection
happens here!
• Mesosphere – upper, middle
& lower mantle
• Outer Core- liquid layer
• Inner Core- solid, very dense
Mantle
Connection:
- Draw the below chart and complete with detailed answers
Compare and Contrast the Layers of the Earth and Sun
Earth layers
Sun Layers
Crust
Photosphere
Asthenosphere
Convective Zone
Mantle
Radiative Zone
Core
Core
How are they the same?
How are they different?
IV. Exit:
• Summarize in 7 sentences what you
learned about the earths
composition (what its made of).