Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
|
Crust |
The layer of rock that forms earths outer core |
|
|
Mantle |
The layer of hot, solid material between Earths crust and core |
|
|
Outer core |
The layer of molten iron and nickel that surrounds the inner core of Earth |
|
|
Inner core |
A dense sphere of solid iron and nickel at the center of the Earth |
|
|
Convection current |
The movement of fluid, caused by differences in temperature, which transfers from one part of the fluid to another |
|
|
Continental drift |
The hypothesis that the continents slowly move across Earths surface |
|
|
Pangea |
Is the name of a single land mass that broke apart 200 million years ago and gave rise to today's continents |
|
|
Sea-floor spreading |
The process by which molten material add new oceanic crust to the ocean floor |
|
|
Plate tectonics |
The theory that pieces of Earths lithosphere are in constant motion, driven by connection currents in the mantle |
|
|
Magma |
Is a molten mixture if rock-forming substance, gases, and water from the mantle |
|
|
Lava |
Is liquid magma that reaches the surface; also, the rock formed when liquid lava hardens |
|
|
Ring of fire |
A major belt of volcanoes that rims the Pacific Ocean |
