Planet Earth: Yesterday, Today, Tomorrow
Unit Test Review
Layers of the Earth
crust
convectingmantle
outer core
innercore
Be able to label the layers of
the Earth.
Tectonic Plate Movement How do the tectonic
plates move?• The hot molten rock
in the convecting mantle rises, cools, and sinks in a cycle.
• This motion causes the plates to move toward each other, away from each other, slide under, or grind past each other.
Tectonic Plate Movement Question 1: What causes the tectonic
plates to move?
energy from the sunocean currentsthe convecting mantleall the above
Types of Plate Boundaries
Types of Plate Boundaries Question 2: At what kind of boundary
do mountains form?
Divergent (move apart)Transform (slide past)Convergent (move together)
Types of Plate Boundaries Question 3: What kind of plate
boundary causes earthquakes?
Divergent (move apart)Transform (slide past)Convergent (move together)
The Surface of the Earth is Constantly Changing!
Weathering and Erosion
Movement of Tectonic Plates
Earthquakes
Glacier Movement
Volcanoes
Floods
Tsunamis
The Surface of the Earth is Constantly Changing
Question 4: What processes cause changes to the Earth’s surface?
Great heat, floods, and earthquakes
Tsunamis, solar energy, and magma
Erosion, glacier formation, and weathering
Movement of plate tectonics, earthquakes, and floods
Evidence of Pangea Scientists believe
Pangea existed based on fossil evidence found on multiple continents.
The shape of continents is also a clue to the existence of Pangea.
Evidence of Pangea Question 5: If identical fossils are
found on two continents separated by an ocean, what conclusion can you draw?
The continents were once connected
The animals could swim wellThe continents are the same ageNone of the above
What Geologists Can Learn From Fossils
What Geologists Can Learn From Fossils
Question 6: When scientists find fossils, what are they able to learn from them?
Evidence of what organisms once lived in that location
Environmental changes in that area
The approximate age of the organism
All of the above
Rock Layers and Age Compare rock layersto a sandwich:
The oldest layer will beon the bottom. Each layer on top getsyounger and younger. The top layer is the mostrecent, or youngest.
Oldest layer
Youngest layer
Rock Layers and Age Question 7: In the picture, which
layer is the youngest?
Layer 1
Layer 2
Layer 3
Review this several times!Good luck
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