Weather Hazards and Climate change

Question 1

Define a natural hazard

Answer 1

When a natural event has potential to cause harm to peoples lives or property

Question 2

Name the 4 types of plate margin

Answer 2

Conservative (sliding next to each other)
Constructive (splitting apart)
Destructive ( one plate subducts under the other)
Collision ( two plates meet head on and move upwards)

Question 3

What is insolation

Answer 3

The amount of Solar radiation reaching a given area

Question 4

What are Jet streams

Answer 4

High altitude currents of air

Question 5

Condition needed for tropical strorms to form

Answer 5

1. Ocean depth of 60-70m (heat can rise)
2. Low wind shear ( high winds tear tropical storms apart)
3. Not along the equator(Coriolis effect not strong enough)
4. Minimum temps of 27 degrees c

Question 6

Why does storm dissipate once it reaches land

Answer 6

There is not enough warm air rising from the sea to power the storm.

Question 7

Describe the formation of a tropical storm

Answer 7

1. The sun warms the water, mostly in the tropics, to 27 degrees
2. This causes warm, moist air to rise through the air in thermals. This gives low pressure at the centre of the storm
3. The air cools as it rises, causing clouds and rain to form.
4. Some cool air sinks back down, causing the eye
5. Air rushes in from higher pressure areas at the outside of a storm to low pressure areas in the middle. This creates wind.
6. The storm rotates because of the coriolis effect

Question 8

Definition of extreme weather

Answer 8

When a weather event is significantly different from the avergae due to it being especially severe or unseasonal

Question 9

3 evidence for Climate change

Answer 9

Ice cores
Glacial retreat
Sea level rise

Question 10

3 natural causes of climate change

Answer 10

Eccentricity
Volcanic activity
Solar flares

Question 11

Describe eccentricity

Answer 11

The path of earths orbit around the sun (changes from circular to elliptical)

Question 12

Describe volcanic changes

Answer 12

1. Volcanic ash block out the sun after an eruption, this lowers the tempurature on earth.
2. Fine droplets form as a result of the conversion of sulphur dioxide to sulphuric acid. These act as tiny solar mirrors reflecting radiation from the sun.

Question 13

3 Human causes of climate changes

Answer 13

Fossil fuel emission
Deforestation (slash and burn)
Agriculture(methane cows)

Question 14

prediction methods tropical storms

Answer 14

radar

Question 15

planning methods tropical storms

Answer 15

infrastructure reinforcing
evacuation planning
sea walls

Question 16

adaptation methods tropical storms

Answer 16

small scale loans
charitable aid
Bilateral aid