All Natural Hazards Flashcards
Give an example of two tectonic plates that form a constructive plate margin
Click to View the Answer
Click to View the Question
North American and Eurasian Plate, South American plate and African Plate, Pacific plate and Nazca plate and the Cocos plate and Pacific plate.
Give an example of two tectonic plates that form a constructive plate margin
What is the name of the upper portion of the mantle?
Click to View the Answer
Click to View the Question
The asthenosphere
What is the name of the upper portion of the mantle?
Describe the physical processes that happen at a destructive plate margin.
Click to View the Answer
Click to View the Question
When oceanic and continental plates collide the denser oceanic plate subducts the continental plate and enters the mantle where it melts. Magma can rise through the lithosphere and erupt as lava through volcanoes. As the oceanic plate subducts, it gets stuck due to friction. Pressure builds up until it is released as an earthquake.
Describe the physical processes that happen at a destructive plate margin.
Give 2 characteristics of oceanic crust.
Click to View the Answer
Click to View the Question
- More dense than continental crust
- Heavier than continental crust
- Younger than continental crust
- Thinner than continental crust.
Give 2 characteristics of oceanic crust.
Where in the world are the majority of the Earth’s volcanoes and earthquakes found?
Click to View the Answer
Click to View the Question
The majority of the Earth’s volcanoes and earthquakes occur around the Pacific Ring of Fire.
Where in the world are the majority of the Earth’s volcanoes and earthquakes found?
