Option B Oceans and coasts: Ocean systems and futures
15 revision questions with answers for Option B Oceans and coasts: Ocean systems and futures, marked SL and HL. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Deflection of moving air and water to the right in the northern hemisphere?
- Pressure gradient force
- Friction
- Centrifugal force
- Coriolis effectRight answer
What this set covers
Currents, climate cycles and ocean law are covered together. The Coriolis effect, gyres, thermohaline circulation, upwelling, El Niño and La Niña, UNCLOS, exclusive economic zones, maximum sustainable yield, bycatch and tropical cyclones appear.
- Common mix-up
- Students often muddle El Niño and La Niña: El Niño brings weaker trade winds and a warmer eastern Pacific, while La Niña brings stronger trade winds and a cooler one.
- Revision tip
- Draw the Walker circulation in normal conditions, then redraw it for El Niño. Separately, list the maritime zones in order of distance from the coast.
All 15 questions and answers
Deflection of moving air and water to the right in the northern hemisphere?
Answer: Coriolis effect
Large circular system of surface currents rotating around an ocean basin?
Answer: Gyre
Deep global conveyor driven by differences in water temperature and salinity?
Answer: Thermohaline circulation
Rise of cold, nutrient-rich deep water to the surface, as off the coast of Peru?
Answer: Upwelling
Periodic weakening of Pacific trade winds, warming the eastern equatorial Pacific?
Answer: El Niño
ENSO phase with stronger trade winds and a cooler-than-average eastern Pacific?
Answer: La Niña
Normal east–west air loop over the equatorial Pacific: rising in the west, sinking in the east?
Answer: Walker circulation
1982 treaty, often called a constitution for the oceans, that sets out maritime zones?
Answer: UNCLOS
Area extending 200 nautical miles from a coast, where a state controls fishing and seabed resources?
Answer: Exclusive economic zone
Maximum breadth of a coastal state's territorial sea, measured from its baseline?
Answer: 12 nautical miles
Ocean areas beyond national jurisdiction, open to all states?
Answer: High seas
Largest catch that can be taken from a fish stock each year without depleting it?
Answer: Maximum sustainable yield
Non-target species, such as dolphins or turtles, taken unintentionally by fishing gear?
Answer: Bycatch
Zone of sea where fishing and other activities are restricted to conserve ecosystems?
Answer: Marine protected area
Intense low-pressure storm forming over oceans warmer than about 26 °C?
Answer: Tropical cyclone
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.