Exploring Life in Extreme Depths

What is the main idea of the passage about the conditions at the summit of Mount Everest and the Challenger Deep?

• Both locations are easy to survive in.

• Both locations have extreme conditions that are challenging for humans.

• The summit of Mount Everest is colder than the Challenger Deep.

• The Challenger Deep is a popular tourist destination.

Why is it pitch dark in the deep ocean according to the passage?

• Because the water is too cold.

• Because water absorbs and scatters sunlight, leaving little light beyond 660 feet.

• Because there are no creatures that produce light.

• Because the ocean floor is covered with dark sand.

How do anglerfish use bioluminescence to their advantage in the deep ocean?

• They use it to scare away predators.

• They use it to attract prey by waving a glowing rod.

• They use it to find their way in the dark.

• They use it to communicate with other fish.

What reasoning can you use to explain why certain types of crabs and bacteria can only exist in the Mariana Trench?

• They need sunlight to survive.

• They require the extreme temperatures and pressure found only in the deep ocean.

• They are too large to live anywhere else.

• They are afraid of predators in other parts of the ocean.

What evidence from the text supports the idea that the deep ocean is a unique environment for life?

• The deep ocean is warmer than the surface.

• The deep ocean has a lot of sunlight.

• Some creatures in the deep ocean have never been seen until recent explorations.

• The deep ocean is full of plants.

What is the purpose of bioluminescence in deep-sea creatures according to the passage?

• To help them swim faster.

• To attract prey and communicate.

• To keep them warm.

• To make them invisible.

Based on the passage, what can be inferred about the survival of humans in the Challenger Deep?

• Humans can survive with special equipment.

• Humans cannot survive due to the extreme cold and pressure.

• Humans can survive if they swim fast enough.

• Humans can survive if they have enough food.

What strategic thinking can be applied to understand why the flashlight fish turns its light on and off?

• To conserve energy.

• To confuse predators.

• To attract curious fish for food.

• To signal other flashlight fish.

What skill or concept is demonstrated by the anglerfish's use of its bioluminescent rod?

• The concept of camouflage.

• The skill of hunting using light.

• The concept of migration.

• The skill of building nests.

How does the passage describe the adaptation of creatures in the Mariana Trench?

• They are adapted to live in warm, sunny environments.

• They are specially built for life in an extreme environment with bioluminescence.

• They are adapted to fly above the ocean.

• They are adapted to live on land.