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What is the earths crust made up of
Solid Rock
Name the four main layers of the Earth.
Crust, mantle, inner core, outer core
What is the semi-molten layer of the Earth called where convection currents occur?
Mantle
What are Tectonic plates
Large pieces of the Earth’s crust that float on the semi-molten mantle.
Who first proposed the theory of continental drift?
Alfred Wegener
What was the name of the supercontinent that once existed?
Pangaea
Explain what happens at a constructive plate boundary.
Plates separate, magma rises to create new crust
Give one landform that forms at a constructive plate boundary.
volcanoes
What happens at a destructive plate boundary?ntle
An oceanic plate collides with a continental plate and is forced under (subduction), creating earthquakes and volcanoes.
What is a passive plate boundary
Plates slide past each other; earthquakes often occur.
Explain what convection currents in the mantle do.
Heat causes molten rock to move in circular patterns, which moves tectonic plates.
Give an example of a mountain range formed by a destructive plate boundary
Andes mountains
What is a fault line
a crack in the earths curst where two tectonic plates meet/ move past each other
Where is the San Andreas Fault located
California
What happens at a passive plate boundary
Plates slide past each other, energy builds up and causes earthquake activity
Which tectonic plate is Ireland located on
Eurasian plate
