Inside the Earth Crossword

I am a type of plate, one which is found on land.
I am one of the layers of planet earth, I am also known as earths outer skin.
I am one of the seven major plates. Ireland is situated on this plate.
I am a type of plate, one which is found in the ocean.
I am one of the seven major plates, I am the smallest. I am situated off the coast of south America.
I am one of the layers of planet earth. My rocks are semi-molten and I am really hot (up to 4000 degrees).
I am one of the layers of planet earth, I am the hottest layer and the furthest from the surface.
I am a natural activity which occurs. I usually happen when plates collide or slide past each other.
I am a natural activity which occurs. I usually happen when plates collide or seperate. I am the reason Iceland was formed.
I am one of the seven major plates. The Carribean and South America are situated on this plate.
I seperate the plates from each other.