IB Geo - Oceans Part 1 End of Section quiz

Oceans are now 30% more acidic than they were in the last century.

• TRUE

• FALSE

Absorbed CO2 in

seawater forms what type of acid? (in words)

Why is ocean acidification a problem for coral reefs?

• Because the increasing acid will dissolve the organisms they rely on for growth

• acidification will reduce calcification in corals and other calcifying organisms, resulting in slower growth and weaker skeletons.

• Acidification of reefs will reduce the tourism that coral reefs depend on for their income

• Who says it's a problem? That's just like your opinion man.

________ is an intensification of normal atmospheric processes in the Pacific Ocean, that results in increased flooding in normally humid areas and increased drought in areas that are relatively dry.

Surface ocean currents are caused by the influence of prevailing winds blowing steadily across the sea

• False

• True

• True-ish

• I have no idea.

What percentage of the Earth's surface is covered by oceans?

• 50%

• 60%

• 70%

• 80%

What is the minimum wind speed of a hurricane?

• Hurricanes are dynamic weather systems, so there is no such thing.

• 65 mph

• 74 mph

• It depends on the atmospheric pressure

What am I?

I'm a low-pressure system that brings heavy rainfall, strong winds and high waves

What conditions are needed for a tropical storm to form?

• One can't say precisely.

• Sea temps over 25c, near the surface, big dark clouds.

• Warm water, near the equator to maximise spinning.

• Sea temps of 27c to a depth of 60m.

  Not too close to the equator.

True or false?

The Gulf Stream is the main reason why the British Isles have mild winters and relatively extremely hot summers.

• TRUE

• FALSE