LAYERS OF THE EARTH
The thinnest layer of the earth
crust
The earth is though to be this old
4.6 billion years
The name of the supercontinent that formed 300 million years ago
Pangea
The number of ice ages the earth has experienced
5
Landforms that have the ability to erupt
Volcanoes
The layer of the earth where magma is found
mantle
Billions of years ago, the earth was bombarded by meteorites carrying what life sustaining substance that filled the earth
water/ oceans
What force drives the plates of the earth
magma in the mantle
What is believed to have killed off most ice age animals
overhunted (people)
The release of energy in the form of ground movements when plates/ crust move
earthquakes
The inner core is made from this metal
iron
80% of all life was killed 65 million years ago by?
meteorite or asteroid
The tectonic plates are pieces of ______________
crust or rock
How much of Canada was covered by glaciers during the last ice age
97%
The main cause of tsunamis are from underwater _____________________
earthquakes
The ocean layer of the earth
hydrosphere
Giant insects, amphibians and fish lived on the earth during this era
Paleozoic
When plates collide on the ocean they tend to push down and form ______________
trenches
The last ice age ended ___________ years ago
10,000
The name of the fault that runs through California where many earthquakes occur
San Andreas
The layer of the earth made from moving liquid metal
outer core
The age of the dinosaurs was during this era
Mesozoic
The name of the German Scientist who theorized the concept of Continental Drift
Alfred Wegener
How thick was the ice over Canada during the last ice age
4 km/ 4000 m
Earthquakes, volcanic eruptions and mountains form along Convergent plate boundaries. where two plates do this?
collide together