Restless Earth 1
- Created by: sophie.rebecca_
- Created on: 20-04-16 16:44
View mindmap
- Restless Earth 1
- What is the Lithosphere and the Asthenosphere?
- Lithosphere: Upper most layer of the earth, cool and brittle, crust and upper part of mantle.
- Asthenosphere: Upper mantle.
- What are the layers of the earth, what states are they and approximately how thick are they?
- Inner core - solid, outer core - liquid, lower mantle - solid, upper mantle - partially solid, crust, solid.
- What are the types of crust?
- Continental (thick) and Oceanic (thin)
- Describe the mantle:
- The Mantle is a layer of semi solid/molten rock. The upper mantle makes up the asthenosphere, and lubricates plate movement.
- How can we tell the structure of the earth, and that it is hot, without seeing it?
- Because of how earthquake waves stop and change as they move between layers, and also from space meteorites from other planets.
- We can tell the earth is hot because of volcanoes and hot springs.
- What is the earths core made of?
- Iron and nickle
- Why is the earth hot? How hot is the core?
- The earth is heated due to radioactive decay in the core, which is 5000 degrees approx.
- Why is the core solid?
- Because it is under lots of pressure.
- How do the convection current in the outer core and mantle work?
- As the core heats the molten rock up, it circulates away from the core, and as it cools down it falls back towards the core as it is more dense again.
- What is a plume?
- A hot, less dense movement of heat towards the earths surface. Bring magma to the surface.
- What is the magnetosphere, and how does it work?
- Huge magnetic field surrounding earth, made by liquid iron in outer core. protects us from space radiation and harmful sun rays.
- What is the Lithosphere and the Asthenosphere?
Comments
No comments have yet been made