Ocean Current Quest

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Test your sea-knowledge with ocean science trivia.

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Kenduki Kaze

New Zealand

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Ocean Current Quest


Froggy Jumps Ocean Current QuestOnline version Test your sea-knowledge with ocean science trivia. by Kenduki Kaze 1 What are the large circular systems of surface currents called? a Turbines b Gyres c Eddies 2 Which force helps form the Ekman transport that moves surface water? a Coriolis force b Wind friction c Gravity 3 What is El Niño associated with in the equatorial Pacific? a Increased upwelling along the coasts b Warmer eastern Pacific and weaker trade winds c Colder western Pacific and stronger trade winds 4 What cycle describes alternating El Niño and La Niña conditions? a Thermocline Cycle b Gaia Cycle c ENSO 5 Which carbon pump is driven by marine organisms building shells? a Physical carbon pump b Biological carbon pump c Thermal carbon pump 6 Which layer shows rapid density changes in the ocean? a Pycnocline b Euphotic zone c Abyssal layer 7 What process brings deep water to the surface near coasts? a Submergence b Downwelling c Upwelling 8 Which current is the strongest surface current around Antarctica? a Gulf Stream b Kuroshio Current c Antarctic Circumpolar Current 9 What does ocean acidification primarily reduce for calcifying organisms? a Available carbonate ions b Phytoplankton abundance c Oxygen concentration 10 What drives deep thermohaline circulation besides surface winds? a Density differences from salinity and temperature b Tidal forces c Solar radiation alone 11 What drives surface currents mainly? a Wind b Tides c Salinity 12 What is the deepest ocean layer called? a Thermocline b Surface mixed zone c Deep zone 13 Which pump moves carbon to deep oceans biologically? a Biological carbon pump b Physical carbon pump c Thermal pump 14 What process forms calcium carbonate shells in organisms? a Carbonate ions combine with calcium b Salinity increase c Thermocline formation 15 Which water layer is about 150m deep and well-mixed? a Pycnocline b Surface mixed zone c Aphotic zone 16 What primarily causes the coriolis effect? a Moon gravity b Earth's rotation c Ocean depth 17 Which current is strongest and encircles Antarctica? a North Atlantic Drift b Equatorial Current c Antarctic Circumpolar Current 18 Upwelling brings what to the surface? a Warm water b Salts c Nutrients 19 What sinks to form deep water in polar regions? a Cold, salty water b Freshwater c Warm water 20 What is the term for surface water movement caused by wind friction? a Ekman transport b Gyre circulation c Thermohaline flow 21 Which cycle links heat and nutrients in oceans deeply? a Surface gyres b Tidal flow c Thermohaline circulation 22 What happens to CO2 in cold seawater? a Less dissolves b More dissolves c Forms as solid CO2 23 Ocean acidification reduces which ions? a Sodium ions b Hydrogen ions c Carbonate ions 24 Which zone permits photosynthesis? a Disphotic zone b Euphotic zone c Aphotic zone 25 El Niño is associated with? a Colder eastern Pacific b Stronger trade winds c Warmer eastern Pacific 26 La Niña typically causes? a Weaker winds worldwide b Less rainfall globally c Stronger upwelling east of South America 27 What primarily moves heat across oceans? a Ocean currents b Tides c Rainfall patterns 28 Which gas dissolves more in cold water? a CO2 b N2 c O2 29 What is downwelling? a Water evaporates b Water moves to deeper ocean c Water rises to surface 30 Which layer contains the densest water? a Pycnocline b Surface layer c Bottom layer 31 What forms part of the ocean sediments long-term carbon storage? a Dissolved CO2 b Calcium carbonate shells c Dissolved sodium chloride 32 What is the term for the ocean’s saltiness level? a Viscosity b Density c Salinity 33 What drives density differences in THC? a Wind speed b Temperature and salinity c Phytoplankton color 34 Which condition reduces upwelling off coastlines? a Weaker wind or reversal b Higher salinity c Stronger wind 35 What is a pycnocline? a Deep water source b Surface wind layer c Rapid density change layer 36 Which zone has no light? a Disphotic zone b Euphotic zone c Aphotic zone 37 Which is NOT a surface current type? a Counter-current b Western boundary current c Transverse current 38 What primarily determines ocean density? a Depth and color b Pressure alone c Temperature and salinity 39 Which process stores carbon in deep sediments long term? a Mechanical pump b Solar pumping c Biological carbon pump 40 Which factor drives the Coriolis effect strongest? a Poles b Mid-latitudes c Equator 41 What triggers coastal upwelling zones? a Moon phases b Tidal waves c Ekman transport away from coast 42 Which oceanic layer is 80% of the ocean depth? a Pycnocline b Surface mixed zone c Deep zone 43 Which gas forms carbonic acid in seawater? a N2 b CO2 c O2 44 What maintains long-term carbon storage in sediments? a Calcium carbonate shells b Organic plastic c Dissolved methane 45 Which process increases surface water salinity? a Precipitation b Evaporation c Run-off 46 What is the term for global heat distribution by oceans? a Heat transport by currents b Weathering cycle c Salinity gradient 47 What is the main result of ocean acidification? a Less CO2 absorbed b Higher pH c More H+ in water 48 Which zone receives the most sunlight? a Aphotic zone b Disphotic zone c Euphotic zone 49 The thermohaline current moves via what mechanism? a Wind only b Density differences c Moon gravity 50 What happens to density with depth generally? a Density increases b Density decreases c Remains constant 51 Which feature modulates global climate by heat transfer? a THC b Tide pool cycles c Surface churn 52 What is a key effect of El Niño on weather? a Warmer Eastern Pacific b Drier Western Pacific c Colder Eastern Pacific 53 Which factor does NOT affect ocean density? a Salinity b Temperature c Light intensity at surface 54 What mainly determines ocean surface temperature? a Deep ocean currents b Latitude and sunlight c Wind speed 55 Which term describes saltier water sinking below less dense water? a Density-driven sinking b Tide casting c Hydrostatic rise 56 Which gas dissolution depends on water temperature? a Oxygen b CO2 c Nitrogen 57 What zone is the best for photosynthesis? a Euphotic zone b Disphotic zone c Aphotic zone 58 What does the NADW refer to? a North Atlantic Deep Water b Nordic Atlantic Deep Water c North Arctic Diffused Water 59 Which process moves CO2 to surface again in carbon pumps? a Subduction b Downwelling c Upwelling 60 Which component is essential for shells in many species? a Calcium carbonate b Sodium chloride c Magnesium sulfate 61 What primarily forms the pycnocline? a Density gradient b Light gradient c Temperature gradient 62 What primarily causes ocean currents to form gyres? a Moon gravity only b Forces including wind and Coriolis c Tidal forces only 63 Which water is least dense? a Cold salty water b Cold freshwater c Warm freshwater 64 What process stores CO2 long-term in deep ocean? a Thermohaline circulation b Tidal mixing c Solar pumping 65 What mainly drives density in the ocean? a Pressure alone b Temperature and salinity c Phytoplankton color 66 What primarily reduces ocean pH (increases acidity)? a Calcium influx b Dissolved CO2 forms carbonic acid c Sea salt addition 67 Which term describes heat transfer by oceans? a Heat transport by currents b Heat transfer by wind c Heat transfer by tides 68 What is the 'biological pump' most associated with? a Dissolving rocks b Salt formation c Phytoplankton producing organic carbon 69 Which factor can increase coastal upwelling? a Calm seas b Strong along-coast winds c Increased salinity only 70 Which condition is typical of El Niño? a Stronger trade winds b Weaker trade winds c More upwelling 71 Which zone experiences no sunlight? a Euphotic zone b Disphotic zone c Aphotic zone 72 What happens to CO2 in colder seas? a Dissolves more easily b Dissolves less easily c Evaporates as gas

Ocean Current Quest

Froggy Jumps

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Created by

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Ocean Current QuestOnline version

by Kenduki Kaze

What are the large circular systems of surface currents called?

Which force helps form the Ekman transport that moves surface water?

What is El Niño associated with in the equatorial Pacific?

What cycle describes alternating El Niño and La Niña conditions?

Which carbon pump is driven by marine organisms building shells?

Which layer shows rapid density changes in the ocean?

What process brings deep water to the surface near coasts?

Which current is the strongest surface current around Antarctica?

What does ocean acidification primarily reduce for calcifying organisms?

What drives deep thermohaline circulation besides surface winds?

What drives surface currents mainly?

What is the deepest ocean layer called?

Which pump moves carbon to deep oceans biologically?

What process forms calcium carbonate shells in organisms?

Which water layer is about 150m deep and well-mixed?

What primarily causes the coriolis effect?

Which current is strongest and encircles Antarctica?

Upwelling brings what to the surface?

What sinks to form deep water in polar regions?

What is the term for surface water movement caused by wind friction?

Which cycle links heat and nutrients in oceans deeply?

What happens to CO2 in cold seawater?

Ocean acidification reduces which ions?

Which zone permits photosynthesis?

El Niño is associated with?

La Niña typically causes?

What primarily moves heat across oceans?

Which gas dissolves more in cold water?

What is downwelling?

Which layer contains the densest water?

What forms part of the ocean sediments long-term carbon storage?

What is the term for the ocean’s saltiness level?

What drives density differences in THC?

Which condition reduces upwelling off coastlines?

What is a pycnocline?

Which zone has no light?

Which is NOT a surface current type?

What primarily determines ocean density?

Which process stores carbon in deep sediments long term?

Which factor drives the Coriolis effect strongest?

What triggers coastal upwelling zones?

Which oceanic layer is 80% of the ocean depth?

Which gas forms carbonic acid in seawater?

What maintains long-term carbon storage in sediments?

Which process increases surface water salinity?

What is the term for global heat distribution by oceans?

What is the main result of ocean acidification?

Which zone receives the most sunlight?

The thermohaline current moves via what mechanism?

What happens to density with depth generally?

Which feature modulates global climate by heat transfer?

What is a key effect of El Niño on weather?

Which factor does NOT affect ocean density?

What mainly determines ocean surface temperature?

Which term describes saltier water sinking below less dense water?

Which gas dissolution depends on water temperature?

What zone is the best for photosynthesis?

What does the NADW refer to?

Which process moves CO2 to surface again in carbon pumps?

Which component is essential for shells in many species?

What primarily forms the pycnocline?