7. GROUP ACTIVITY
EARTH’S CRUST MODEL
• Peel the orange. Examine the peeling. If it
represents the lithosphere, which part is
the crust? Which part is the
asthenosphere?
• Put back the peelings on the orange by
fitting in the edges of the sections, like a
jigsaw puzzle. Desccribe the orange now,
Where does each section represent?
8. Directions for today’s activity:
• Use the templates to cut the layers of the Earth out of construction paper:
• Use:
– Green for the crust
– Light brown for the mantle
– Yellow for the outer core
– Red for the inner core
• Lay them one on top of the other like in this diagram:
9. Next. . .
• Fold all of the circles down the middle (where the dotted line is in the figure).
Then glue the bottom layers down to hold them in place.
• You have just made a slice of the Earth! Hold on to this until everyone is
finished and we’ll learn a little bit more about each part. You’ll be taking
notes on the upper half of the Earth.
Glue these layers down
10. Earth Layers
• The Earth is divided into four main
layers.
*Crust
*Mantle
*Outer core
*Inner core
11. The Crust
* The Earth’s crust is the
outermost surface.
*It is a very thin layer of solid
rock. It is the thinnest layer
of the Earth.
*The crust is 5-35km thick
beneath the land and 1-8km
thick beneath the oceans.
* The crust of the Earth is
broken into many pieces
called plates. The movement
of these plates causes
earthquakes.
12. The Lithosphere
• On your mantle layer, draw a
dotted line around the very
edge of the circle. This is
the lithosphere.
• The lithosphere is composed
of part of the crust and the
upper part of the mantle (the
top 100 km).
• It is composed of hard,
brittle rock
13. The Athenosphere
* The athenosphere is the
part of the mantle
underneath the
lithosphere. Draw a
dashed line about an inch
under your dotted line.
* It is made of molten rock
and metal so that it
“flows” like hot asphalt.
* The athenosphere is the
part of the mantle that
moves and causes the
tectonic plates of the
crust to move as well.
14. The Mantle
* The mantle is the largest
layer of the Earth. It is
2900km thick.
*It includes the lithosphere and
athenosphere.
*It is relatively flexible—it
flows like very viscous liquid.
*It is very hot—1600°F at the
top and 4000°F towards the
center of the Earth.
15. The Core
* The core of the Earth is
like a ball of very hot
metals. The core is divided
into 2 layers—Outer and
Inner.
* The core is SO hot and has
SO much pressure that if
you were to go there—you
would be squished into
something even smaller than
a marble.
16. The Outer Core
* The outer core is liquid
metal iron and nickel
with 10% sulfur and/or
oxygen.
* It is very hot—
4000-9000°F.
* The outer core is
2,250km thick.
17. The Inner Core
* The inner core is solid
metal due to the
extreme heat and
pressure.
* It is composed of iron
and nickel. It is
responsible for the
magnetic field the Earth
generates.
* The inner core is 800km
thick and is 9000°F.
18. REMINDERS!
1. Open your Google Classroom
2. Click the URL link posted in the Google Classroom
3. Enter your name, and click start Quiz
4. There are 12 questions, you have only 60 seconds
to answer each items and 2 attempts to answer
the questions correctly.
GOOD LUCK!
QUIZALIZE
