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