How Humpbacks go Fishing

17. 17 A. This question has two parts. First, answer part A. Then, answer part B.

Part A: Which of the following is an inference that can be drawn from the article?

• a. Humpback whales are the most intelligent animal living in the ocean.

• b. A single bubble-blowing whale could succeed in trapping all the fish it wanted.

• c. Scientists are sometimes mistaken about why animal act the way they do.

• Dr. Sharpe's aquarium experiments were more important to his study that observing real whales.

18. 17 B. Part B. Which sentence from the article best supports the answer to Part A?

• A. "But humpbacks that live near the west coast of North America have a surprising and spectacular way of catching fish."

• B "Most researchers thought the humpbacks were fighting over the fish."

• C. "To find out, Dr. Sharpe and his team placed a school of herring into an aquarium."

• D. "As the fish are squeezed into a tighter group, the bubble-blowing whale continues to swim in a circle, closing the net and trapping the fish in a bubble corral."

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

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

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

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

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

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

• A. sound

• B. bubbles

• C. cameras

• D. temperature

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

• A. paragraph 4

• B. paragraph 5

• 6. C. paragraph 9

• d. paragraph 13

21. 21. Select the two sentences that should be left out of a summary of this artic

• A. Humpback whales hunt together to catch schools of herring.

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

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

• D. Researchers used sonar to watch the whales at work.

• E. Tiny shrimp-like creatures called krill live near the west coast.