Echo
Learning Object — Clip
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Clip: Echo
Discover how people and bats use echolocation for navigation.
Learning Objectives
- Realize that sound is energy, and know how it travels. Sound begins when energy produces a vibration that causes a disturbance in the molecules of the medium in which the sound is to travel. The energy is transferred through a medium via waves.
- Describe sound waves. Sound travels through longitudinal, or compression–rarefaction,...
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Supporting Activities
- Cup phone experiment. Have students work in pairs or small groups. Using Styrofoam cups, plastic cups, and paper cups, have each group of students make “cup phones” by punching a hole in the bottom of each matching cup and tying a string inside to connect two cups. Have students experiment to see which cup conducts sound the best. Try these other v...
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