The theory that all continents are fragments of Pangaea now drifting apart.
What is the Continental Drift Theory?
100
Number of major tectonic plates.
What is 12-15?
100
Created the Continental Drift Theory
What is Alfred Wegener?
100
Earthquakes and Volcanoes are usually located in relation to these.
What is a plate boundary?
100
A zone of active volcanoes that encircles the Pacific Ocean.
What is the Ring of Fire?
200
_________________ are a result from the build up of stress at a plate boundary.
What is earthquakes?
200
Number of continents today.
What is 7?
200
Most scientists disagreed with Wegener's idea of drifting continents because _________________________________________________________________.
What is lack of evidence.
200
Earthquakes and ___________ are common along plate boundaries.
What is volcanoes?
200
The Himalayan mountains are the result of a ___________________________ boundary.
What is What is convergent boundary?
300
All the continents were once joined together.
What is Pangaea?
300
Mountainous land form that spews lava.
What is a Volcano?
300
Define the continental drift theory?
What is the belief that continents have moved slowly apart to their current locations on Earth?
300
What is the surface of the Earth made up of?
What is tectonic plates?
300
__________ was used to discovered mountain ranges in the middle of many oceans.
What are sound waves/sonar?
400
Boundary where plates with different densities collide and the denser plate sinks under the less dense plate.
What is a subduction zone?
400
Earthquakes are a result of what?
What is released pressure?
400
What clue supported the continental drift theory?
A) Fossils of animals have been found on continents separated by oceans.
B) Similar rock structures have been found on different continents.
C)a puzzle-like fit of all the continents
D)all of the above
What is D.
400
How many years ago did the continents begin to form?
What is 3.8 billion years?
400
Country formed on the mid-Atlantic ridge.
What is Iceland?
500
A break in Earth’s crust.
What is a fault?
500
Giant Wave caused by earthquake.
What is a Tsunami?
500
Continental Drift Theory was not accepted because it did not explain this.
What is how the continents moved?
500
Causes the tectonic plates to move.
What is convection currents?
500
The Himalayan mountains are the result of a ___________________________ boundary.