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Density and layers of the Earth Promethean
Warm Up
September 9
Density and layers of the Earth Promethean
Draw an illustration of 3 objects with different
densities in an aquarium filled with water.
2. Label the most dense object and the least dense
object.
3. Describe the densities of the objects below (use
the terms density, atoms, mass, and volume in
your explanation).
1.
Essential Question:
-What layers of the earth include the asthenosphere and how does it
affect the lithosphere?
Objective: 8.E.2.1
-TSW understand how the Earth is made up of several layers.
1. Compare Earth’s layers to a hard boiled
egg. Draw an illustration and label where
the core, mantle and crust would be
located. Do not write these questions.
2. How are the layers of an egg different from
the layers of the Earth?
3. How are the layers of the Earth
similar to the layers of an egg?
Essential Question: What are the layers of the Earth?
How does the asthenosphere affect the lithosphere?
Objectives: TSWU how the Earth is made of different layers.
TSWU how tectonic forces are influenced by the asthenosphere.
1. Describe the following layers:
-Lithosphere
-Asthenosphere
2. Include descriptions and
pictures.
Essential Question: What are the layers of the Earth?
How does the asthenosphere affect the lithosphere?
Objectives: TSWU how the Earth is made of different layers.
TSWU how tectonic forces are influenced by the asthenosphere.
Warm Up
1.
2.
3.
September 10, 2015
How does the asthenosphere affect the
lithosphere?
What is a plate tectonic?
What are three ways in which plate tectonics can
move?
Essential Question:
-How does the movement of plate tectonics affect the Earth’s surface?
Objectives: 8.E.2.1 / 2.2
-TSW explore plate boundaries to understand how plate tectonic
movement affects Earth’s surface.
Warm Up September 11, 2015
1. The Lithosphere is part of which two layers?
2. What are three evidences that the Earth’s tectonic
plates are moving?
3. Identify the types of plate tectonic boundaries:
a) crust is created
b) crust is destroyed
c) crust is neither created or destroyed
Objectives: 8.E.2.0
-TSWBAT identify several evidences to support the theory of continental drift.
Essential Question:
-What evidence did Alfred Wegener use to support his theory of continental
drift?
Warm Up
September 14
What is uniformitarianism ?
2. How is a sponge floating on boiling water similar
to the lithosphere and asthenosphere.
1.
Objectives: 8.E.2.0
-TSW examine clues to Earth’s past to determine how the continents looked
220 million years ago.
-TSW understand the theory of plate tectonics.
Essential Question:
-What evidence did Alfred Wegener use to support his theory of continental
drift?
Density of Water Compared to other Things
Objective
 TSW
explore different types of
plate boundaries by
completing the snack
tectonics lab.
 TSW understand how plate
movement affects the Earth
and its residence.



What are plates?
How do plates interact?
What is the Earth made of?
How did the Earth form?
Estimated Earth was formed 4.6 billion
years ago
Big Bang- materials collide
Impact, gravity, radioactive decay produce
extreme heat
Density- float or sink?
*How did the other planets form?
What is Earth made of?
Inner core- ball of hot solid metal
Dense solid metals such as nickel and iron
Solid do to the immense pressure!!
7000-8000°C
2400km thick (dia.)
Outer Core
Made of liquid metal
Mostly dense liquid metals such as nickel and iron
Temp. and press. lower than inner core
4400-6100°C
2300km thick
Mantle
Thickest layer (2900 km)
Hot rock (less dense than core)
Made up of silicon, iron, magnesium, aluminum,
oxygen, and other minerals.
870-4400°C
Upper part is cool and rigid, lower part is like paste
Crust
Thin layer of cool rock
Mostly made up of silicon and aluminum but also has
other minerals like nickel and iron.
6-70km thick
Oceanic and Continental
Lithosphere and Asthenosphere
litho- “stone or rock”
asthenes- “weak” (soft)
Lithosphere* - A rigid layer of
cooler rock in the crust and
upper mantle
Asthenosphere* - A layer of
hotter, softer rock in the upper
mantle.
Video
 Discovery
Education
 “Elements of Earth Science: The
Planet Earth”
Notebook Page 9
Continental Drift
Continental Drift
Late 1800’s Alfred Wegner proposed the
idea of continental drift
 (What is drift? Cars)

Evidence?


Pangaea
Fossils- same reptile found in
South America and western Africa

Climate- tropical plant fossils found
in Greenland

Geology- same rock types found on
different continents

Sea-floor spreading
3 Evidences of Continental Drift
from the Sea floor.
1.
2.
3.
Scientists can determine that the sea floor is
spreading at the spreading center (divergent
boundaries in the ocean)
Age of the sea floor is younger near a mid ocean
ridge and older near a trench.
Scientists have found that rock is being destroyed
at ocean trenches (subduction zones).
Discussion point: If the sea floor has been spreading
for millions of years, why is the Earth not getting
any larger?
Plate Tectonics Activity
COMPARE & CONTRAST THE EARTH’S
LITHOSPHERE with ASTHENOSPHERE
1. EXPLAIN HOW CONVECTION WORKS
2. HOW DOES the TEMPERATURE IN the
EARTH help create CONTINTENTAL
DRIFT?
3. What does DENSITY have to do with
EARTH’s inner LAYERS?
Draw
Earth’s
layers (litho,
mantle
astheno,
LIST FOUR (4) PIECES of
inner &
EVIDENCE that SUPPORT
the theory of CONTINENTAL DRIFT. outer core)
1.
2.
3.
4.
EXPLAIN WEGENER’s EVIDENCE for
HIS theory of CONTINENTAL DRIFT!
DESCRIBE EACH ONE IN COMPLETE
SENTENCES
Explain his
theory!!!
DRAW a pic of
WEGENER
Here
Plate Tectonics Activity
COMPARE & CONTRAST THE EARTH’S
LITHOSPHERE with ASTHENOSPHERE
1. EXPLAIN HOW CONVECTION WORKS
2. HOW DOES the TEMPERATURE IN the
EARTH help create CONTINTENTAL
DRIFT?
3. What does DENSITY have to do with
EARTH’s inner LAYERS?
Draw
Earth’s
layers (litho,
mantle
astheno,
LIST all 4 PIECES of
inner &
EVIDENCE that SUPPORT
the theory of CONTINENTAL DRIFT. outer core)
1.
2.
Explain his theory of continental
3.
drift!!!
4.
EXPLAIN WEGENER’s EVIDENCE for
HIS theory of CONTINENTAL DRIFT!
DESCRIBE EACH ONE IN COMPLETE
SENTENCES
Terminology Review
Layers of Earth
 Tectonic plates
 Continental drift
 Pangaea
 Mid-ocean ridge
 Convection
 Magnetic Reversal

1.1-1.2
Can you see the individual tectonic
plates?
Recap - PLATES move 4 ways!
DIVERGING PLATES
PLATES that MOVE AWAY form
NEW CRUST usually FROM THE
MIDDLE OCEAN RIDGES.
CONVERGING PLATES
CONTINENTAL to CONTINENTAL
(land to land)CRUSTS COLLIDE:
MOUNTAINS!!!!!!!
MAGNETIC REVERSALS!
TRANSFORM plates
OCEAN into CONTINENTAL CRUSTS
COLLIDE:
Rubbing AGAINST each other
SUBDUCTING PLATES
EARTHQUAKES!
VOLCANOES!!!
Can you identify a divergent boundary?
Can you identify a convergent boundary?
Do you see where a transform boundary is located?
OCEAN & CONTINENTAL
PLATES COLLIDE
The “ring of fire” is the Pacific plate
pushing under other continents crusts
(SUBDUCTION ZONES)
JUST LOOK AT
ALL THE
VOLCANOES!
1.
2.
3.
4.
5.
6.
Wegener’s Pangaea Puzzle
Label each land mass (look on whiteboard)
Color code your puzzle pieces using the key
Cut out puzzle pieces
Glue your Pangaea puzzle on your construction
paper (check your work first)
Finish the crossword puzzle
Answer the essay question and attach it to your
work: Write a ½ - 1 page argumentative essay on
whether the evidence provided by Alfred Wegener
was compelling and conclusive enough for scientific
acceptance of the Theory of Continental Drift.
*****Be thorough and provide examples****
Pangaea Reflection
1.
2.
3.
4.
5.
What is Alfred Wegner’s theory?
List all of the evidences that Wegner collected to
support his theory. Provide at least three (but
there are more).
Which evidence did Wegner not use to support
his theory? Why?
How did you piece together the map? Why did
you make the decision to put certain land
masses together?
According to the data, the land masses must
have moved. How long do you think this took?
What does this say about the future of our
tectonic plates?
Objective
TSW complete the plate tectonics post
quiz and prepare for the chapter 1
assessment.
 TSW watch Bill Nye’s Greatest
Discoveries “Magnetic Reversal” to
understand the evidence that supports
the idea of polar shift.

Warm Up September 16
Name two pieces of
evidence that support the
theory of plate tectonics.
2. The lithosphere is made up
of which 2 Earth layers?
1.
Warm Up September 20
1. What
are hot spots?
2. How are hot spots used
to track plate
movement?
Objective
1. TSW
complete chapter 1 A
“Plate Tectonics”
assessment.
2. TSW complete chapter 2B
visual Vocabulary
assignment.