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1. Dolphins can hold their breath for. . .
a. from five to eight minutes.
b. twenty minutes.
c. one hour.

2. Scientists believe that dolphins evolved from. . .
a. flying reptiles.
b. sea animals.
c. land animals.

3. Dolphins swim in. . .
a. all the oceans on Earth.
b. only one ocean.
c. only two oceans.

4. Dolphins spend their time in small groups of five to seven individuals. The groups come together to play, feed and find mates, then separate. Dolphins often rejoin a group later, often with different family members or friends. This pattern of behavior is called. . .
a. fuss-bustling.
b. fission-fusion.
c. bio buddies.

5. When dolphins play they. . .
a. tumble and rub one another.
b. approach one another from behind or slightly to the side.
c. display behaviors described in both a. and b.

6. Scientists can identify individual dolphins by size and physical markings such as. . .
a. the shapes of their ears.
b. color patterns or scars.
c. their mouths and the way they “smile.”

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