Chapter 14 HW

On this second half of the image of different species of cetaceans (right half), match the correct letter to each of the following.

1. A: Narwhal 2. C: Killer whale 3. B: Humpback whale 4. D: Gray whale

The diagram below shows skeletal and morphologic differences between two pinnipeds. Match the letters with the appropriate example of each.

1. B: Seal 2. A: Sea lion

The image below is a cutaway diagram of a sperm whale's head, showing the interior structure of its echolocation system. Match the correct letter to each of the following items.

1. C: Distal air sac 2. D: "Monkey's muzzle" (echolocation clicks are generated here) 3. B: Frontal air sac 4. A: Blowhole

On this image of different species of cetaceans (left half), match the correct letter to each of the following.

1. D: Blue whale 2. C: Sperm whale 3. A: Northern right whale 4. B: Bottlenose dolphin

On the generalized diagram of a fish shown below, match the correct letter to each of the following features.

1. D: Caudal fin 2. B: Spiny dorsal fin 3. A: Soft dorsal fin 4. C: Pectoral fin 5. E: Gill covering (operculum)

How does sonar work?

A sound signal is bounced off the ocean floor.

How are echolocation and sonar different?

Echolocation is used by dolphins and whales, whereas sonar is a data collection tool developed by people.

Where do dolphins generate sounds for use in echolocation?

In the blowhole

What does a dolphin's melon do?

The melon focuses sound waves during emission.

What does sonar data tell us about the seafloor?

depth, shape, and composition