Earth's Layers
Plate Tectonics
Volcanic Eruptions
100
How many layers does Earth's core have?
2
100
In what layer of Earth are the tectonic plates located?
The Crust
100
What can a volcanic eruption trigger?
Tsunamis, flash floods, earthquakes, mudflows and rockfalls.
200
What is the hydrosphere?
The water on Earth's surface.
200
What is the name of the volcanoes that are all aligned together where the tectonic plates meet?
The Ring Of Fire
200
What percentage of Earth's surface is volcanic?
20%, 90%, 40%, or 80%?
80%
300
What is the hottest layer of Earth?
The Mantle
300
How long do the plates move each year?
12 centimeters
300
The seafloor and some mountains were formed by countless volcanic eruptions.
True or False?
True
400
What part of Earth's crust is solid?
The continental crust
400
What natural disasters do plate tectonics cause?
Volcanoes, earthquakes, and tsunamis.
500
What is Earth's deepest layer?
The Inner Core
500
Who made the theory of continental drift?
Alfred Wegener