Reading...
Play button
Play button
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;
9 Cards in this Set
- Front
- Back
|
What are the 2 prominent theories?
|
Wegner
Hess |
|
|
What is Wegner's theory?
|
-At one time the earth was a super continent named Pangaea
-- his theory is based on the fact that coal and oil were found in the tundra (coal and oil need vegetation to form) |
|
|
What is Harry Hess' theory?
|
2 super continents
1. Lauasia - Europe, Asia, North America 2. Gondwanaland - South America, Antarctica, India, Australia |
|
|
What is the subduction zone?
|
The collision of plates
aka convergence |
|
|
What creates mountain ranges in the ocean?
|
Plates sliding on top of one another
|
|
|
What causes earthquakes?
|
Plates moving
|
|
|
What are trenches?
|
The deep parts of the ocean
|
|
|
What forms in the cracks?
|
Volcanoes
|
|
|
How are mid oceanic mountain ranges formed?
|
Molten lava crystallizes and forms on the ocean floor
|
