Sound
Sound Cloze
Fill in the blanks with words from the box.
|compression |echo |echolocation |energy |
|flat |frequency |medium |pitch |
|rarefaction |vacuum |vibrates |wave |
| | Sound is a form of _________________ that people can hear. Sound is produced when an object |
|[pic] |_________________ back and forth. When an object vibrates, it pushes the air around it, which causes the air |
|The string vibrations produce sound that travels |to alternately bunch up and then spread apart. When the air particles bunch up, it’s called a |
|through the air to your ears. |_________________ and when the particles spread apart, it’s called a _________________. These compressions |
| |and rarefactions travel outwards forming a sound _________________. The material that the sound wave moves |
| |through is called a _________________. Without a medium, sound cannot travel and so there is no sound in a |
| |_________________ such as outer space. |
| |
|The _________________ of a sound wave is a measure of how many times an object vibrates per second. Objects that vibrate with a high frequency produce sounds with|
|a high _________________, which is how our ears perceive sound. |
| |
|Sometimes sound waves bounce off a hard, _________________ surface producing an _________________. Some animals such as bats and whales use echoes to locate prey.|
|Using echoes to locate an object is called _________________. |
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