Earth's Interior/ Pla. Tectonics Quiz 1 Flashcards
What Is The Rock Composition Of The Crust?
Mostly aluminum and silicon
What state of matter is the crust?
Solid
What are the two types of crust?
Oceanic crust and continental crust
What state of matter of matter is the mantle?
Semi-solid
What causes plates to move due to the temperature differences between the mantle and the crust, hot air rises and cool sinks?
Convection (heat) currents
What increases as you go deeper?
Pressure and temperature
How thick is the Mantle?
1,800 miles thick
What layer make up 80% of the Earth’s volume?
The mantle
Plate tectonics theory that pieces of the Earth’s lithosphere, called plates, move about slowly on top of what layer?
The Asthenosphere
The continents are believed to have been connected together in a large continent called what, and what is the meaning of the word?
Pangea, and “all land”
Name three “evidences” of plate tectonics.
Matching coastlines, shared fossils, and paleomagnetism. (Can also be polar reversals, matching glaciers, rock strata (layers) match, and matching mountain ranges.
What is the rock composition of the mantle?
Mostly iron and magnesium
What is the mantle made of?
Tectonic plates
What is the rock composition of the core?
Iron and Nickel
Is the core solid or liquid?
Solid