1.1 Atmosphere As Global Shstem

Question 1

Where is most solar energy revieved and why

Answer 1

At the equator as suns rays are more conecntrated over a smaller surface area and strike at right angle.

Question 2

Where is least solar energy recieved and why?

Answer 2

At poles as revieve at lower angle and take longer to heat up a larger surface area

Question 3

Describe high pressure

Answer 3

Cold air is more dense which brings heat creating low rainfall and no clouds

Question 4

Describe low pressure

Answer 4

Heated air is more dense so rises above cold air creating low pressure so lots of rainfall and clouds

Question 5

Describe Low pressure belt

Answer 5

Warm air rises causing lots of rainfall and lots of clouds

Question 6

Describe high pressure belt

Answer 6

Cold air sinks creating high pressure belt with no rainfall and no clouds

Question 7

3 types of atmospheric circulation cells and what angle

Answer 7

Hadley-30
Ferrel-60
Polar-at top and bottom

Question 8

Where do trade winds blow in southern hemisphere

Answer 8

South-east to north-west until they reach equator

Question 9

Where do trade winds blow in northern hemisphere

Answer 9

North-east to south-west until they reach equator

Question 10

Westerlies in southern hemisphere

Answer 10

Blow north-west to south-east

Question 11

Westerlies in northern hemisphere

Answer 11

South-west to north-east until they reach pole

Question 12

What happens at 30 degrees north and south

Answer 12

The cool air sinks,creating high pressure belt with cloudless skies and very low rainfall

Question 13

What happens at 60 degrees north and south

Answer 13

Cold air is blow from poles meets warm air. Because warm air is less dense it rises and forms low pressure.

Question 14

What occurs at poles

Answer 14

Cool air will sink forming a high pressure belt

Question 15

Describe deep ocean currents

Answer 15

Ocean currents are large scales movements of water thst transfer heat energy from warmer to cooler regions.
Surface currents are caused by winds and help transfer heat away from equator
1)There are also deep ocean currents driven by differences in water density so when water freezes at poles,the surrounding water gets saltier which increases the density
2)as it gets denser it sinks causing warmer water to flow in at surface which creates a current
3) this warmer eater is cooled and sinks continouing the cycle which is called thermohaline circulation

Question 16

Differences between tindouf-high pressure and singapore low-pressure

Answer 16

Tindouf-temperatures up to 36 degrees and low up to 14 degrees
-caused by high pressure systems as cool air is more dense
-warm air trapped at ground causing small amount of rain
-sit in high pressure belt

Singapore-high levels of rain and temperature (26 dgerees)
-on equot,low pressure system causing humid,wet weather
-heated air rises as less dense sinks causing clouds and rain

Question 17

What happens at equator

Answer 17

At equator the suns warms the earth,which transfers heat to air sbove causing it to rise. This created a low pressure belt. As air rises,it cools and condenses forming clouds and rain

Question 18

What occurs after 30 degrees north and south between 60 degrees north and south

What are trade winds and westerlies?

Answer 18

The cool air reaches the ground surface and moves as suface winds either back to equator or toeards poles:
-surface winds blowing towards equot are called trade winds
-trade winds blow from from SE the southern hemisphere and from NE in northern hemisphere. As the equot winds meet and heated by sun. This causes them to rise and form clouds
- surface winds blowing towards poles are called westerlies. They blow from NW in southern hemisphere and from SW in northern hemisphere