World Book Trivia Challenge--11/5-under The Sea

1. Coral reefs need enough sunlight in order for _____________ to occur.

Photosynthesis

Sun burn

Combustion

Coral reefs grow only in water with enough light for photosynthesis to occur in the algae. Photosynthesis is the process in which an organism converts energy from sunlight into food.

Explanation

Coral reefs grow only in water with enough light for photosynthesis to occur in the algae. Photosynthesis is the process in which an organism converts energy from sunlight into food.

2. A walrus is a large kind of __________.

Dolphin

Seal

Octopus

Scientists classify the walrus as a kind of large seal. The walrus is the only seal with tusks.

Explanation

Scientists classify the walrus as a kind of large seal. The walrus is the only seal with tusks.

3. An octupus is able to change colors.

True

False

An octopus can escape danger by rapidly changing colors. These color changes may startle a predator or enable the octopus to blend with its surroundings. Octopuses also may use color changes to communicate with one another and as a courtship display.

Explanation

An octopus can escape danger by rapidly changing colors. These color changes may startle a predator or enable the octopus to blend with its surroundings. Octopuses also may use color changes to communicate with one another and as a courtship display.

4. Electric eels can produce a discharge of up to _____ volts.

100

1,725

650

Electric eels can produce a discharge of up to 650 volts. This discharge can kill a fish or stun a human being, though electric eels rarely harm people.

Explanation

Electric eels can produce a discharge of up to 650 volts. This discharge can kill a fish or stun a human being, though electric eels rarely harm people.

5. A sea wasp is not poisonous.

True

False

Some jellyfish can inflict painful and dangerous stings to people. Jellyfish called sea wasps or box jellyfish inject a poison deadlier than any snake venom. Some people have died within three minutes of being stung by a sea wasp. Sea wasps live in the waters of Australia and Oceania.

Explanation

Some jellyfish can inflict painful and dangerous stings to people. Jellyfish called sea wasps or box jellyfish inject a poison deadlier than any snake venom. Some people have died within three minutes of being stung by a sea wasp. Sea wasps live in the waters of Australia and Oceania.

6. What is another name that the great barracuda is often called?

Tiger of the sea

Bear of the sea

Monster of the sea

The great barracuda, found in the Atlantic, Indian, and western Pacific oceans, is the largest species of barracuda. It can grow to about 6 feet (1.8 meters) and 100 pounds (45 kilograms). The great barracuda is called the "tiger of the sea" because it is swift and destructive.

Explanation

The great barracuda, found in the Atlantic, Indian, and western Pacific oceans, is the largest species of barracuda. It can grow to about 6 feet (1.8 meters) and 100 pounds (45 kilograms). The great barracuda is called the "tiger of the sea" because it is swift and destructive.

7. How do whales breathe?

With gills

With lungs

With siphons

Fish breathe by means of gills, which absorb dissolved oxygen from water. Whales have lungs and must come to the surface to breathe. But they can hold their breath for long periods.

Explanation

Fish breathe by means of gills, which absorb dissolved oxygen from water. Whales have lungs and must come to the surface to breathe. But they can hold their breath for long periods.

8. Earless seals do not have ears.

True

False

Earless seals are different from fur seals and sea lions. These seals do not have ear flaps, but they do have ears. In fact, they have excellent hearing both above and below the water.

Explanation

Earless seals are different from fur seals and sea lions. These seals do not have ear flaps, but they do have ears. In fact, they have excellent hearing both above and below the water.

9. A sponge is a type of ________.

Plant

Animal

Flower

Adult sponges do not move about from one place to another, and many sponges look like plants. For these reasons, people once regarded sponges as plants. But today, scientists classify sponges as animals. Like most animals, sponges eat their food. They cannot manufacture their own food, as do plants.

Explanation

Adult sponges do not move about from one place to another, and many sponges look like plants. For these reasons, people once regarded sponges as plants. But today, scientists classify sponges as animals. Like most animals, sponges eat their food. They cannot manufacture their own food, as do plants.