Welcome! Please set up your notebook and answer this

1
Welcome! Please set up your notebook and answer
this In Question If a tree falls in the
forest and nobody is around to hear it, does it
make a sound? Be sure to answer in complete
sentences.
Layers of the Earth 9/15/2011 In
Question Out Question
Layers of the Earth 9/15/2011
2
Introduction to Planet Earth

• Lets dig a hole to China!

Click here for Layers Rap
3
Earth Stats

• The Earth's mass is about 5.98 x 1024 kg.
• Earth is the densest planet in our Solar System
  (mass/volume).
• Earth is made of several layers with different
  compositions and physical properties, like
  temperature, density, and the viscosity (ability
  to flow).

4
The Composition of the Earth
Draw this diagram on the right side of your
notebook on the outside of your foldable.
5
The Composition of the Earth

• Crust
• Thinnest layer (5-100 km)
• Two types of crust
• Continental
• Average 30 km thick
• Less dense
• Oceanic
• Average 5-8 km thick
• More dense
• What is it like?
• Graham crackers

6
The Composition of the Earth

• Mantle
• Molten to solid-like rock
• Extremely Thick! (2,900 km)
• Iron and Magnesium
• It is too far down to drill
• How do we know what it is made of?
• Scientists infer based on
• Pushed up rock
• Ocean floor/molten rock
• What is it like?
• Peanut butter

www.soc.soton.ac.uk
7
The Composition of the Earth

• Core
• Pretty darn big. (6,856 km)
• (Slightly bigger than Mars!)
• 33 mass of the Earth
• Scientists think.
• Made mostly of iron
• Some nickel, sulfur, oxygen
• What is the evidence?
• The particular way seismic waves travel
• Earths Magnetic field
• What is it like?
• Jelly and Milk chocolate

8
The Composition of the Earth

• Outer Core
• Liquid iron and nickel
• 2,200 km thick
• Inner Core
• Solid iron and nickel
• 1,228 km thick

9
Asthenosphere Viscous Liquid
Lithosphere Solid
The Structure of the Earth
Outer Core Liquid
Mesosphere Solid
Inner Core Solid
10
Lithosphere rock sphere Crust and upper rigid
part of Mantle
Asthenosphere weak sphere Middle part of
Mantle
Mesosphere middle sphere Lower mantle close
to core
11
Out Question Write the layers of the Earth
from the outside to the inside. Be sure to
answer in complete sentences.
Layers of the Earth 9/15/2011 In
Question Out Question
Layers of the Earth 9/15/2011