1
Q
Requirement for a tropical cyclone
A
- Low pressure
- Sea surface of 26.5 degrees
- Humid air
2
Q
Describe the formation of a tropical cyclone
A
- Warm air rises as they are less dense
- Air from high pressure areas rushes in to replace the rising air
- Replacing air will then rise and forms a continuous flow of rising air
- As the air rises it cools and condenses. This releases heat energy which helps to power the tropical cyclone
- Air at the top of the storm goes outwards away from the center of the storm
- The coriolis force causes the rising air to spin around the center
- Some of the air sinks in the middle of the storm forming the eye
3
Q
Describe the formation of a composite volcano
A
- Forms on a convergent plate boundary
-The oceanic plate is forced beneath the continental plate as it is more dense than continental plate.
-When the plate sinks into the mantle it melts to form magma. - Pressure of the magma builds up beneath the Earth’s surface. The magma then escapes through the weak rock and rises through a composite volcano.
4
Q
How is a shield volcano formed
A
- Formed on a divergent plate boundary
- Continental plates move apart form one another which causes the mantle to rise.
- The rising of magma can cause the creation of shield volcanoes
5
Q
How is a earth quake formed on the conservative plate boundary
A
-Two plate boundaries slide pass each other in the opposite direction or in the same direction but at different speeds
- Friction will be created and the plates become stuck.
- Pressure builds up because the plates are still trying to move.
- When the pressure is released, it sends out huge amounts of energy causing an earthquake.
6
Q
protections against earthquakes
A
- Rubber shock absorbers in the foundations of buildings
- Steel frames that can sway during earth movements
- Open areas outside of buildings where people can assemble during an avacuation
- lightweight roofs designed to reduce damage and injury
IGCSE geography
flashcards
Decks in class (5)
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