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.
What is a volcano?
100
when the earth starts shaking and it has a big crack that spits the earth.
What is a earthquake?
100
when tectonic plates interact with each other.
What is a plate boundary?
100
Map Makers
Who were the earliest people to consider the idea of moving landmasses?
200
lava is what is in the volcano.
What is lava?
200
it slits the ground.
what does a earthquake do?
200
yes
do they contribute to earthquakes?
200
Edward Suess.
who found Goudwanaland?
300
Magma is what comes out of the volcano.
What is magma?
300
they mostly happen in California
where do earthquakes happen at mostly?
300
15
How many major tectonic plates have scientists identified?
300
Alfred Wegnar
who presented their idea about the continental drift?
400
they explode.
What does a volcano do?
400
10,000
how many people do they kill each year?
400
Familiar outlines of the continents and oceans often do not match the outlines
Why are the boundaries of the tectonic plates not always easy to identify?
400
Harry Hess
who was the American scientist?
500
1500 active volcanoes.
how many active volcanoes are there?
500
A shift in the ground because of faults.
What causes them?
500
Familiar outlines of the continents and oceans often do not match the outlines