front 1 Mammals | back 1 An animal with a backbone, hair or fur, and milk-producing glands to feed its young |
front 2 Sound Waves | back 2 Vibrations transmitted through substances in waves with frequencies that can be heard |
front 3 Echolocation | back 3 In certain animals, such as dolphins and bats, a system in which sound waves are sent out and their echoes interpreted to determine the direction and distance of objects |
front 4 Density | back 4 The quantity of matter in a given unit of volume |
front 5 Language | back 5 A system of signs or sounds that refer to objects or ideas and that can be combined in different ways to produce different meanings |
front 6 While dolphins resemble fish, they are actually _________________. | back 6 Mammals |
front 7 Dolphins send out _______________ from their heads and receive them in their lower jaws. | back 7 Sound waves |
front 8 Through ________________, dolphins can identify objects in the environment. | back 8 Echolocation |
front 9 What is a dolphin's signature whistle? | back 9 A unique sound that identifies that particular dolphin |
front 10 How does echolocation work? | back 10 By bouncing sound waves off objects in the environment |