Causes
What gas is the main driver of ocean warming?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Helium
C. Carbon dioxide
hat happens to water when it warms?
A. It freezes
B. It expands
C. It disappears
D. It becomes saltier
B. It expands
What ecosystem is most affected by ocean warming?
A. Deserts
B. Grasslands
C. Coral reefs
D. Forests
C. Coral reefs
Warmer oceans make hurricanes…
A. Weaker
B. Stronger
C. Disappear
D. Colder
B. Stronger
What is a dead zone?
A. Area with no water
B. Area with very low oxygen
C. Frozen ocean
D. Desert near ocean
B. Area with very low oxygen
What process traps heat in Earth’s atmosphere?
A. Photosynthesis
B. Greenhouse effect
C. Erosion
D. Condensation
B. Greenhouse effect
What is thermal expansion?
A. Water shrinking
B. Water expanding when heated
C. Ice forming
D. Oxygen dissolving
B. Water expanding when heated
What is coral bleaching?
A. Coral growing faster
B. Loss of algae due to heat stress
C. Coral turning into rock
D. Coral eating fish
B. Loss of algae due to heat stress
Hurricanes get energy from…
A. Wind only
B. Warm ocean water
C. Rocks
D. Ice caps
B. Warm ocean water
What decreases in warm oceans?
A. Oxygen levels
B. Salt levels always increase
C. Sunlight
D. Wind speed
A. Oxygen levels
What human activity releases most CO₂?
A. Wind energy
B. Fossil fuel burning
C. Recycling
D. Ocean fishing
B. Fossil fuel burning
What is ocean stratification?
A. Mixing of all layers
B. Layers forming due to temperature differences
C. Freezing ocean water
D. Ocean evaporation
B. Layers forming due to temperature differences
What do corals lose during bleaching?
A. Fish
B. Zooxanthellae algae
C. Oxygen
D. Sand
B. Zooxanthellae algae
What increases with stronger hurricanes?
A. Pollution only
B. Rainfall and intensity
C. Ocean salinity
D. Fish population
B. Rainfall and intensity
One economic impact of ocean warming is…
A. More farming
B. Loss of fisheries
C. More oil production
D. More forests
B. Loss of fisheries
About how much excess heat do oceans absorb?
A. 10%
B. 50%
C. 90%
D. 5%
C. 90%
What process moves nutrients to surface waters?
A. Evaporation
B. Upwelling
C. Precipitation
D. Condensation
B. Upwelling
What can happen if bleaching continues?
A. Coral death
B. Coral growth
C. Ocean cooling
D. Increased salinity
A. Coral death
Ocean warming causes extreme weather to become…
A. Less frequent
B. More intense and frequent
C. Nonexistent
D. Stable
B. More intense and frequent
What international agreement helps fight climate change?
A. Kyoto Protocol
B. Paris Agreement
C. NATO Treaty
D. Geneva Convention
B. Paris Agreement
Why do oceans absorb so much heat?
A. They are shallow
B. They cover most of Earth + have high heat capacity
C. They reflect sunlight
D. They are frozen
B. They cover most of Earth + have high heat capacity
Why does warming reduce ocean mixing?
A. Stronger wind
B. Stable temperature layers prevent circulation
C. More fish
D. Increased tides
Stable temperature layers prevent circulation
Why are coral reefs important?
A. They reduce tides
B. They support biodiversity and fisheries
C. They cool hurricanes
D. They block sunlight
B. They support biodiversity and fisheries
What role does the ocean play in climate?
A. Only produces oxygen
B. Regulates temperature by absorbing heat
C. Creates earthquakes
D. Blocks sunlight completely
B. Regulates temperature by absorbing heat
One solution to ocean warming is…
A. Burning more coal
B. Increasing fossil fuels
C. Using renewable energy
D. Cutting down forests
C. Using renewable energy