What are crust, mantle, outer core, and inner core?
100
These are the two types of crust.
What are Oceanic and Continental?
100
This is the definition of plate tectonics.
What is "The theory that the earth's crust sits on top of thick plates of rock. The plates and the crust they carry are shifting slowly over the earth."
100
This is how weathering changes the earth.
What is rocks, mountains and other landforms are broken down by physical and chemical forces.
100
This is when scientists began to accept Alfred Wegener's theory.
What is the 1960s-1970s.
200
The layer makes up 80% of the Earth's volume. It has zones called the lithosphere and asthenosphere. Rock flows as thick liquid, denser than crust
What is the mantle?
200
These are the two parts of mantle.
What are the lithosphere and the asthenosphere.
200
This is the person who developed the theory of plate tectonics
Who is Alfred Wegener?
200
This is how plate tectonics changes the earth.
What is as they move apart, slide past, and collide, plates can create earthquakes, volcanoes, and mountains.
200
This theory explains how new earth material is added to the ocean floor along the mid-ocean ridges. Lava flows through cracks in the ridges, cools and hardens into rock, causing the ocean floor to widen.
What is sea-floor spreading?
300
The temperatures of this layer could reach 13,000 degrees F. It's made mostly of iron and nickel, and the pressure squeezes liquids into solids.
What is the inner core?
300
This is the part of the mantle where plates are located.
What is the lithosphere?
300
This was Alfred Wegener's job
What is scientist and meteorologist?
300
This is a destructive force.
What is weathering?
300
This was a "super continent" composed of all the continents joined together into one big continent. The earth had one continent and one ocean during this time.
What is Pangaea?
400
The temperatures of this layer range from 8,000 degrees F to 11,000 degrees F. It's made mostly of iron and nickel. It is made of molten rock, which may explain the Earth's magnetic field
What is the outer core?
400
This layer is made up of igneous, sedimentary, and metamorphic rock.
What is the crust?
400
This is why other scientists did not accept Alfred Wegener's ideas at first
What is because the thought he did not have a proper background as a geologist.
400
This is what continents do with the movement of the plates.
What is move, grow, and shrink?
400
This is how long ago that the Pangaea might have occurred.
What is 225 million years ago?
500
This is the top layer of earth. It is the thinnest layer. It is made up of igneous, sedimentary, and metamorphic rock.
What is the crust?
500
These two layers are mostly made up of nickel and iron.
What is the outer and inner core?
500
This is the year that the theory of plate tectonics was developed.
What is 1910?
500
This is how erosion changes the earth.
What is breaks down and carries away weathered material from rocks, mountains, and other landforms. When the eroded material is deposited, it creates new landforms.
500
When the Pangaea broke apart, this is what the two landmasses were called.