Saltwater Habitats

Which sentence about coral is TRUE?

• Coral is a kind of plant.

• Coral is a kind of animal.

• Coral lives in freshwater.

• Coral lives in the deep sea.

Overfishing can cause some kinds of fish to be ENDANGERED. What does ENDANGERED mean?

• harmful to living things

• helpful to plants

• very few of its kind are left

• many of its kind are left to eat

Why do you think the midnight zone is very cold?

• Sunlight cannot reach the midnight zone to warm it.

• There are not many animals there to keep it warm.

• Vents in the Earth's crust give off very cold gases.

• The midnight zone is found under the North Pole.

Which is the LARGEST ocean zone?

• The sunlit zone

• The twilight zone

• The midnight zone

• The coastal zone

What happens LAST?

• A fish eats the plastic pieces and gets sick.

• A person throws a plastic bag on the ground.

• The bag goes down a gutter and into the ocean.

• The plastic bag breaks down into pieces.

1. Some deep-sea animals can give off light. How might they use this adaptation?

• to attract prey or scare off predators

• to help stay warm in very cold waters

• to keep themselves from getting sick

• to help them find underwater vents

Many sea turtles eat sea plants. In which ocean zone would you probably find sea turtles?

• in the sunlit zone

• in the twilight zone

• in the midnight zone

• in the abyssal zone

Why are there no plants in the midnight zone?

• The water is too salty for plants to live.

• There is no sunlight for plants to grow.

• It is too warm for plants to grow.

• Animals have eaten all the plants.

Which sentence is FALSE?

• The midnight zone receives no sunlight.

• Most marine life is in the twilight zone.

• The sunlit zone is at the top of the ocean.

• Plants can grow underwater in the seas.

Why do you think people call coral reefs the "rainforests of the ocean"?

• Both coral reefs and rainforests are home to many living things.

• Both coral reefs and rainforests are very wet and sunny places.

• Both coral reefs and rainforests can be found in South America.

• Both coral reefs and rainforests have rich soil for plants to grow.