Hazards and Structure of the Earth Flashcards
Give one reason why the incidence of natural hazards is increasing.
Click to View the Answer
Click to View the Question
Reasons include:
- Climate change
- Deforestation
- Urbanisation
- Population increase
Give one reason why the incidence of natural hazards is increasing.
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?
Give 2 characteristics of continental crust.
Click to View the Answer
Click to View the Question
- Less dense than oceanic crust
- Thicker than oceanic crust
- Lighter than oceanic crust
- Forms the Earth’s continents
- Older than oceanic crust
Give 2 characteristics of continental crust.
Explain ridge push and slab pull as a cause of plate movement.
Click to View the Answer
Click to View the Question
Ridge push –magma rises as the plates move apart. The magma cools to form new plate material. As it cools It becomes denser and slides down away from the ridge. This causes other plates to move away from each other.
Slab pull – The denser plate sinks back into the mantle under the influence of gravity. It pulls the rest of the plate along behind it.
Slab pull – The denser plate sinks back into the mantle under the influence of gravity. It pulls the rest of the plate along behind it.
Explain ridge push and slab pull as a cause of plate movement.
What are the characteristics of the outer core?
Click to View the Answer
Click to View the Question
The layer surrounding the inner core. A liquid layer of iron and nickel.
What are the characteristics of the outer core?
