Hey guys, I had a test on Earthquakes, Volcanoes and Tectonic plates the other day and I got a very high mark. I only used these revision notes, purely just the below, and this is why I'm sharing them to help others...
What are the 4 layers of the Earth and what are their characteristics?
- Inner core = solid iron + nickle, hottest
- Outer core = liquid iron and nickle, 2nd hottest
- Mantle = Magma, 3rd hottest part
- Crust = Continental plates + oceanic plates, 4th hottest
What causes the plates to move?
A convection current is what makes the plates of the Earth move. Firstly the core heats up the magma and as we know, hot things rise, therefore the hot magma rises until it gets far enough away from the core to cool. When it cools it heads back down to the core. As it travels across to head back down it moves the plates along with it.
What are the different types of plate boundary and what do they do?
Destructive = Where one plate is forced under another plate causing friction, where they rub, causing it to melt into magma.
Constructive = Where the plates separate and the magma rises from the mantle to cool when it reaches the ocean.
Collision = Where two plates come together and the land in between them buckles and rises upwards to create mountains.
Conservative = NO VOLCANOES!!! They jub against each other at different speeds. They do not directly collide head on. Sometimes earthquakes occur here.
What would you find where?
Conseravtive = Earthquakes
Collision = Mountains
Constructive = Mid ocean ridge
Destructive = Volcanoes
Where in the world would you find an example of…