Plate Boundaries
Which type of plate boundary is when 2 plates collide?
Convergent boundary
What are some things that could happen on Earth's surface because of plate tectonics?
Earthquakes, volcanoes, formation of mountain ranges, and deep ocean trenches
What is Pangea?
A super landmass of all the continents as one supercontinent.
True or False: The continents are still moving about 2.5cm to this day.
True!
What boundary could you expect to find big earthquakes?
transform
What type of plate boundary is when 2 plates move apart?
Divergent
What theory states that Earth's crust is broken into pieces that move around and cause changes in Earth's surface?
The Theory of Plate Tectonics
This scientist thought that the fit of the continents wasn't just a coincidence, but instead suggested they were once joined together.
Alfred Wegener
What is the name for a crack or fissure in the earth?
a fault
Where could you find a rift valley?
Divergent boundary
What type of plate boundary is when 2 plates slide past each other?
Transform
What is the name for the plasticlike layer below the lithosphere where the convection currents occur?
Asthenosphere
What is the idea that states that the continents slowly moved to their present positions on Earth?
Continental drift
Which of these is not evidence to support the theory of continental drift?
climates, fossils, human remains, and matching land features
Human remains
What is the name for a crack in the Earth's crust where tectonic plates meet?
Plate boundary
What is it called when 2 plates are converging and one sinks below the other and becomes part of the mantle?
Subduction
What is the driving force behind the theory of plate tectonics?
Convection currents drive the plates to move.
What is the name for the sections composed of the crust and part of the upper mantle?
Plates
The oceanic crust is like a conveyor belt while moving apart. This moves the continents along, too, while a new crust is being added on the bottom of the ocean. What does this describe?
Sea floor spreading
What are two types of evidence that geologists use to learn about Earth's Interior?
Transform - earthquakes and faults
Divergent - rift valleys and mid ocean ridges
Convergent - mountain ranges and volcanoes
Explain how convection currents work.
Convection is the cycle of heating, rising, cooling, and sinking which is called a convection current. These cause the tectonic plates above to move.
What is some evidence that Wegener had that he used to show Pangea existed?
-fossils on both landmasses matched up
-the continents fit together like a puzzles
-landforms matched up
Why could plants and animals have lived on Antarctica during the time of Pangea?
Antarctica had a warmer climate because it was not so far south when it was part of Pangea.
It is the formation, movement, and subduction of Earth's plates. It states that the crust is broken into pieces that move around and cause changes in Earth's surface.