Hazardous earth

Question 1

What happens in an area of low pressure?

Answer 1

In an area of low pressure, warm air rises. This causes cloudiness and rainfall

Question 2

What happens in an area of high pressure?

Answer 2

In an area of high pressure, cool air sinks. This cause arid conditions - no rainfall, clear skies.

Question 3

Why is the equator warm?

Answer 3

The equator is warm because it is closest to the sun meaning it receives the most infrared rays

Question 4

What is a circulation cell?

Answer 4

A circulation cell is when the heat from the sun powers a circle of air movement

Question 5

Why is precipitation high at the equator?

Answer 5

Precipitation is high at the equator due to the rising warm air

Question 6

What are ocean currents?

Answer 6

Ocean currents are when dense cold water sinks and warm water is pulled in to replace the cold water. it is powered by wind and density differences.

Question 7

What are the natural causes of climate change?

Answer 7

The natural causes of climate change are Milankovitch cycles, sunspots, asteroid collisions, volcanic eruptions, ocean currents

Question 8

What are the human activities that influence climate change?

Answer 8

The human activities that influence climate change are transport, energy production, farming and industry

Question 9

What are the evidence of climate change?

Answer 9

The evidence of climate change is rising global temperatures, rising carbon dioxide levels, warmer sea temperatures, rising sea levels, melting ice caps and extreme weather

Question 10

What is the greenhouse effect?

Answer 10

The greenhouse effect is when the suns infrared rays bounce onto the earth, which is then bounced back into the atmosphere but is then trapped in an insulating layer around the earth due to the increase of greenhouse gases, causing global warming

Question 11

What are the consequences of global warming?

Answer 11

The consequences of global warming are more droughts, disease spreading, more pests, destruction from extreme weather and coastal flooding

Question 12

What temperatures must waters be in order for cyclones to form?

Answer 12

Cyclones only form when water temperatures at 26.5 degrees Celcius

Question 13

What are the key characteristics of cyclones?

Answer 13

The key characteristics of cyclones are low pressure, the Coriolis force, and its structure (a cylinder with rising spiralling air which is 640km wide and 10km high)

Question 14

How do tropical cyclones move?

Answer 14

Tropical cyclones start in the tropics. They move westward as they spin away from the equator as winds move east around the equator. It reaches a belt of winds from the west causing them to change direction. They can travel 640 km in a day.

Question 15

When do cyclones intensify?

Answer 15

Cyclones intensify when they reach warm sea temperatures of 26 degrees Celcius when there is low wind shear and when there is high humidity

Question 16

When do cyclones dissipate?

Answer 16

Cyclones dissipate when they reach land and lose their warm water energy source. They also dissipate when they move into cold waters, or/and when they run into other weather systems when the wind is being blown in different directions.