Twilight Zone
True or False: This zone gets the most sunlight and is where most ocean plants (like phytoplankton) make food by photosynthesis.
What is False
True or false: This zone gets the most sunlight
What is true
True or false: This zone is the deepest part of the ocean
what is true
What is false
Why can't most plants grow in the twilight zone? Give one sentence.
What is not enough sunlight reaches that depth for photosynthesis.
Name two common animals you might find in the sunlight zone
What is tuna, dolphins, sea turtles, reef fish
Give one reason why very few species live in the hadal zone
What is the pressure
Because there's no sunlight, animals in the midnight zone often rely on falling food from above. What is the name for this falling organic material?
Name one fish that lives in the twilight zone
What is lanternfish or hatchetfish.
Explain why oxygen levels are generally higher in the sunlight zone than deeper zones.
What is sunlight and photosynthesis produce oxygen; mixing air at the surface adds oxygen
Name one kind of animal or organism scientists have found living in hadal trenches
What is amphipods
Many midnight-zone creatures produce their own light. What is that ability called?
What is bioluminescence
Many twilight-zone animals have large eyes. Explain how this helps them survive
What is bioluminescence.
This plant-like organism floats in the sunlight zone and is the base of many ocean food webs
What is phytoplankton
Describe one special adaptation animals might have to survive the extreme pressure in the hadal zone.
What is strong flexible cell structure or compact bodies
Name one adaptation (other than bioluminescence) that helps animals survive in the midnight zone.
What is slow metabolism, large mouths, expandable stomachs and reduced eyes
Some twilight-zone animals migrate up to the sunlight zone at night. What is this daily movement called?
What is vertical migration
Describe two adaptations animals in the sunlight zone have for avoiding predators
What is camouflaging, speed, warning colors, hiding in coral reef
Scientists use special equipment to explore the hadal zone. Name one tool or method used
Manned submersibles, remotely operated vehicles (ROVs), deep-sea landers.
Explain how pressure and temperature in the midnight zone affect the kinds of animals that can live there.
What is animals with soft bodies and can adapt to the pressure and scarce food