How Humpbacks Go Fishing

Which sentence BEST supports the ideas that humpbacks work in groups and form lifelong relationships with other whales?

• "Humpback whales are known for feeding alone or in pairs."

• "When they spot a school of herring, the humpbacks dive into the depths and close in on the fish from below."

• "Whales are known to use bubbles and loud calls when they try to chase away other whales."

• "Over the years, the research group has seen that the humpback whales often live and hunt together for years."

Which sentence from the article shows why scientists at first thought the whales were fighting each other for food?

• "Most of the time, they plow through the ocean with their huge mouths open, scooping up thousands of tiny shrimplike creatures called krill."

• "Suddenly, all of the whales explode out of the water at once, right in the middle of the bubble-circle."

• "Whales are known to use bubbles and loud calls when they try to chase away other whales."

• "A single whale swims below the fish, carefully releasing air from its blowhole to create a wall of bubbles."

Which BEST shows that herring are afraid of light-colored objects?

• Herring live in the dark depths of the ocean, not near the lighter surface.

• Herring swim away from the white flipper model, but not from the dark one.

• Herring will not swim through the bubbles that the whales create.

• Herring behave differently in lighter tanks than they do in dark ones.

How do herring react to the bubbles whales blow?

• They swim toward them.

• They won't swim through them.

• They swim parallel to them.

• They generally ignore them.

According to paragraph 7, what do "sonar" devices use to "see" under water?

• sound

• science

• cameras

• temperature

Which paragraph has evidence to support the claim, "The whales were working together"?

• paragraph 4

• paragraph 5

• paragraph 9

• paragraph 13

Which item should be taken out of a summary of this selection?

• Humpback whales hunt together to catch schools of herring.

• Whales blow bubbles and wave their flippers to trap fish.

• The Crittercam is a special video camera that attached to a whale.

• Researchers used sonar to watch the whales at work.