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Layers of Earth
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What is the lithosphere?
Layer of the earth made of the crust and upper mantle
What can be formed when tectonic plates separate or move away from each other?
a rift valley
What can be formed when tectonic plates collide or move into each other?
Mountains, volcanoes, earthquakes
What are tectonic plates?
pieces of land that connect together on the Earth's outer shell, like an eggshell
What is Pangea?
a theory that all of the continents were attached a long time ago
Why do plate tectonics move?
Their movement is caused by heat within the Earth.
What is a fault?
cracks in the earth's crust where there is movement
What happens in the Ring of Fire?
It is where many earthquakes happen and where volcanoes form
What is seafloor spreading?
tectonic plates split apart from each other
How do scientists know so much about the earth's core and deep layers?
Because convection currents cause the earth the change (volcanoes erupt, earthquakes happen)
What is the layer of earth right below the crust?
mantle or athensosphere
Which part of the earth is the least dense?
crust
Which part of the earth is the most dense?
inner core
What type of plate boundary is this?
convergent
What type of plate boundary is this?
divergent
What type of plate boundary is this?
subvergent
What type of plate boundary is this?
transform
Which plate is located at #1?
Pacific Plate
Which plate is located at #2?
North American
What are the 2 types of the Earth's crust?
ocean and continental
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