Earth Structure - Amelia 11 Soc

2. Which one of the earth layers that mostly consists of iron and nickel?
4. ____ rocks are made when molten rock cools down and solidifies.
7. The middle layer of earth's interior layer.
8. Tectonic plates move because of convection currents in the Earth’s mantle. These are driven by the ____ produced by the decay of radioactive elements inside the Earth.
13. The continental crust is broken into pieces called ____ plates.
15. ___ layers differ in chemical composition.
16. Texture of earth's inner core.
17. Tectonic plates mademostly of _____ and ____.
18. The crust and the upper layer of the mantle together make up a zone of rigid,brittle rock called?
19. The theory of plate tectonics was proposed at the beginning of the last century by a German scientist named _____

1. ___ mantle has a temperature in a range of 1,400°C – 3,000°C
3. Tectonic plates mademostly of _____ and ____.
5. Type of earth's crust that underlies the ocean basins.
6. ____ layers differ in their strength or rigidity. These layers do not correspond on a one-to-one basis with the compositional layers.
9. Which part of earth's mantle with the thickness of only 100 km?
10. Inner core radiates its heat by?
11. ____ occur when molten rock pushes up through weaknesses in the crust.
12. Term used when all the continents were joined to be one giant continent.
14. The thinnest earth layer
20. ____ in the outer core generates the magnetic field.