What is a graphic representation of the passage of time as a line.
100
How often do volcanoes erupt?
What is about depends on volcanoes.
100
What Layer of the earth do we live on?
What is the crust.
100
What are the main types of boundaries?
What is convergent, divergent, transform
200
What are volcanoes
What is a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
200
What are earthquakes?
What is a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
200
Name the two main types of the crust?
What is continental and oceanic
200
True or false the Oceanic boundary is the thickest?
What is False.
300
Why do volcanoes erupt
What is tectonic plates move etc.
300
Why do earthquakes erupt?
What is tectonic plates move.
300
What is the thickest layer of the Earth?
What is the mantle.
400
When did scientist believe that dinosaurs began to go extinct according to there calender?