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Dolphins & Porpoises
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Question 1 |
Dolphins are
A | fish. |
B | mammals. |
C | amphibians. |
Question 2 |
What is the easiest way to tell a dolphin from a porpoise?
A | Dolphins have larger heads and longer snouts. |
B | Dolphins have teeth but porpoises do not. |
C | Porpoises have spots. |
Question 3 |
It is thought that the dorsal fin on a dolphin's back
A | warns prey when dolphins are on the hunt. |
B | is for decoration. |
C | helps to balance the dolphin. |
Question 4 |
Like bats, dolphins rely on
A | echolocation. |
B | venom. |
C | flight. |
Question 5 |
Do dolphins make sounds below water?
A | No. |
B | Yes, they make "creaky door" sounds underwater. |
C | Yes, they "click" and make sounds too high for us to hear. |
Question 6 |
Do dolphins use tools?
A | Yes, they use rocks to break open clams. |
B | Yes, they use coral reefs to corner and capture fish. |
C | Yes, they use reeds to lure fish out of caves. |
Question 7 |
If a shark attacks, what is the most effective way dolphins can defend themselves?
A | By swimming away as fast as they can. |
B | By surrounding the shark and ramming it in the belly with their noses. |
C | By biting. |
Question 8 |
Dophins are called
A | toothed whales. |
B | baleen whales. |
C | killer whales. |
Question 9 |
How many different species are there in the dolphin family?
A | 21 |
B | 24 |
C | 42 |
Question 10 |
How do dolphins keep saltwater from irritating their eyes?
A | Their eyes are protected by a jellylike substance. |
B | They keep their eyes closed underwater. |
C | They have an extra see-through eyelid on each eye. |
Question 11 |
Using sonar, a dolphin can detect a fish the size of a minnow
A | from 10 feet away. |
B | from 50 feet away. |
C | from 50 yards away. |
Question 12 |
How does a healthy dolphin help a sick dolphin?
A | The healthy dolphin catches fish for the sick dolphin. |
B | The healthy dolphin supports the sick dolphin at the surface so it can breathe. |
C | The healthy dolphin "sings" a whale song. |
Question 13 |
The fold pattern in a dolphin's brain most closely resembles the brain folds of
A | humans. |
B | chimpanzees. |
C | hoofed animals. |
Question 14 |
If you ever come across a stranded dolphin, what should you do?
A | Push it back out to sea. |
B | Keep it wet and call an aquatic park for rescue. |
C | Rub sunscreen lotion on it. |
Question 15 |
Ancient fishermen thought it was a bad omen if
A | dolphins jumped alongside their boats three times. |
B | dolphins rode waves. |
C | dolphins got killed in the fishermen's nets. |
Question 16 |
Dolphins are
A | cetaceans. |
B | crustaceans. |
C | barnacles. |
Question 17 |
LIke all mammals, dolphins have hair. Where is it?
A | All their lives they have a few haris around their blowholes. |
B | A birth there are a few whiskers around the mouth, which are soon lost. |
C | They have eyelashes. |
Question 18 |
What are flukes?
A | Flukes are another name for flippers. |
B | Flukes are lucky events in a dolphin's life. |
C | Flukes are the flat part of a dolphin's tail. |
Question 19 |
How many nostrils do dolphins have?
A | Two |
B | One |
C | None |
Question 20 |
Why do dolphins have such sharp teeth?
A | To grab and hold fish |
B | To chew |
C | To fight |
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