Exploring the Deep Sea

What percentage of Earth's biomass lives in the oceans?

• Less than 2%

• Around 10%

• Approximately 50%

• More than 90%

Where is most of the ocean's biomass located?

• Near the surface within 200 meters

• In the twilight zone

• In the abyssal plain

• In the hadal zone

What is the primary food source for many deep sea species?

• Phytoplankton

• Marine snow

• Coral reefs

• Siphonophores

What is the record for the deepest scuba dive?

• 100 meters

• 200 meters

• 332 meters

• 500 meters

What percentage of deep sea species use bioluminescence?

• Less than 10%

• Around 30%

• Over 50%

• More than 90%

What is the purpose of bioluminescence in deep-sea organisms?

• To attract prey

• To communicate

• To scare attackers

• All of the above

What is the name of the deepest point in the oceans?

• The Challenger Deep

• The Abyssal Plain

• The Mariana Trench

• The Midnight Zone

What is the water pressure at the Challenger Deep?

• 100 bar

• 500 bar

• 1,086 bar

• 2,000 bar

What is the name of the deepest living fish ever seen?

• Vampire squid

• Dumbo octopod

• Grenadiers fish

• Ethereal snailfish

What was found in the Challenger Deep in 2018?

• Plastic bags

• Deep-sea corals

• Manganese nodules

• Extremophile bacteria