Earth Layers
Movement
Evidence
Random
Random 2
100
Outer layer of Earth
Crust
100
Divergent
100
Supercontinent named by Alfred Wegener
Pangea
100
Tectonic plates that slide past each other are
Transform
100
The Earth is _______ years old
4.5 billion
200
Densest, hottest layer of Earth
Inner core
200
Name of tectonic plates that move towards each other
Convergent
200
Explain how continent coastlines fitting together support plate tectonics / continental drift
Once were connected but now not
200
Difference between lava and magma?
Lava = above ground
Magma = below ground
200
Which sinks below the other: dense or less dense crust?
Dense
300
Thickest layer of Earth
Mantle
300
Tectonic plates move because of __________________.
Convection currents
300
Explain how fossils support plate tectonics / continental drift
Found on same continents that are far apart - continents had to have been connected
300
Earthquakes can be created by
- divergent, convergent, or transform tectonics
- Earth's crust moving
300
Alfred Wegener's theory that plate tectonics is based on
Continental drift
400
4 "layers" that make up Earth
Inner core
Outer core
Mantle
Crust
400
Type of tectonic plate that creates land and seafloor
Divergent
400
Older seafloor is (close to - OR - far from) spreading centers at divergent plates
Far from
400
Earth first looked like this
Hot molten lava / magma
No liquid water
Red / orange
400
Which is denser: continental or oceanic crust?
Oceanic
500
What makes up the lithosphere?
Crust and upper mantle
500
Explain convection currents
Heat rises, cools, and sinks
500
Name 3 pieces of evidence that support continental drift / plate tectonics
1. continents fit
2. fossils
3. rocks
4. seafloor spreading
5. satellite data
500
Ring of Fire is...?
Area (Pacific) along tectonic plates with many volcanoes & earthquakes
500
Asthenosphere is the
thin layer of mantle under lithosphere