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Question 1
Multiple Choice
What percentage of Earth's biomass lives in the oceans?
- Less than 2%
- 10%
- 20%
- 50%
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Lava
Sequencing
What’s Hiding at the Most Solitary Place on Earth? The Deep Sea
Tim Horton
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Question 2
Multiple Choice
At what depth does the twilight zone of the ocean begin?
- 50 meters
- 200 meters
- 332 meters
- 700 meters
Question 3
Multiple Choice
What is the main reason many deep-sea creatures use bioluminescence?
- To generate heat
- To perform photosynthesis
- To communicate and hunt
- To attract mates
Question 4
Multiple Choice
What is the primary source of food for many deep-sea organisms?
- Marine snow
- Coral reefs
- Algae
- Sunlight
Question 5
Multiple Choice
At what depth does the midnight zone of the ocean start?
- 1,000 meters
- 3,800 meters
- 4,000 meters
- 6,000 meters
Question 6
Multiple Choice
Which deep-sea creature uses long fangs to trap its prey?
- Vampire squid
- Viperfish
- Frilled shark
- Siphonophores
Question 7
Multiple Choice
What are manganese nodules used for by deep-sea corals and sponges?
- Food source
- Anchors
- Bioluminescence
- Reproduction
Question 8
Multiple Choice
Where can extremophile bacteria be found in the deep sea?
- Twilight zone
- Abyssal plain
- Midnight zone
- Rift valleys
Question 9
Multiple Choice
What is the deepest point in the ocean called?
- Mariana Trench
- Challenger Deep
- Abyssal plain
- Hadal zone
Question 10
Multiple Choice
What unusual item was found by scientists at the deepest point of the ocean in 2018?
- A shipwreck
- A plastic bag
- A giant squid
- Gold deposits
Question 11
Multiple Choice
What is the water pressure at the deepest point in the ocean equivalent to?
- 10 cars stacked
- 100 cars stacked
- 200 cars stacked
- 1,800 elephants stacked
Question 12
Multiple Choice
What is the main challenge for carnivorous fish in the midnight zone?
- Lack of oxygen
- Low temperatures
- Finding food
- High salinity
Question 13
Multiple Choice
What record does the ethereal snailfish hold?
- Largest fish
- Fastest swimmer
- Deepest living fish
- Most bioluminescent fish
Question 14
Multiple Choice
How do vampire squid save energy in the deep sea?
- By hunting in packs
- By using bioluminescence
- By floating without motion
- By eating marine snow
Question 15
Multiple Choice
What is the primary characteristic of the abyssal plain?
- High biodiversity
- Grey mud and rocks
- Coral reefs
- Sunlight penetration
Question 16
Multiple Choice
What role do siphonophores play in the deep sea?
- Producers
- Predators
- Scavengers
- Decomposers
Question 17
Multiple Choice
What happens to the speed of life in abyssal depths?
- Increases significantly
- Remains the same
- Decreases significantly
- Varies greatly
Question 18
Multiple Choice
What do deep-sea corals use to anchor themselves?
- Marine snow
- Hydrothermal vents
- Manganese nodules
- Rift valleys
Question 19
Multiple Choice
What is the primary function of bioluminescence in deep-sea creatures?
- Generating heat
- Photosynthesis
- Communication and hunting
- Reproduction
Question 20
Multiple Choice
What surprising discovery was made at the Challenger Deep in 2018?
- A new species
- A plastic bag
- A shipwreck
- Gold deposits
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