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### How to study your flashcards.

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### 18 Cards in this Set

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• Back
 Q What is sound? A a disturbance that travels through a medium as a longitudinal wave. Q What does a drumhead create when it moves out? A it presses the air molecules together and creates compressions in the air Q What does a drumhead create when it moves in? A it spreads the air molecules apart and creates rarefactions in the air. Q Through what mediums can sound travel? A gases, liquids, and solids Q When sound waves pass through a hole, what do they do? A The sound waves spread out, a process called diffraction. Q What is a larynx? A a person's voice box Q Through what type of medium does sound travel fastest? A solids Q Through what medium does sound travel slowest? A gases Q What causes sound to travel at different speeds? A The properties of the medium it is traveling through. Q What 3 properties of a medium determine the speed of sound? A 1. elasticity 2. density 3. temperature Q What is elastisity? A The ability of a material to bounce back after being disturbed. Q What is density? A how much matter (mass) there is in a given volume or space. Q What is temperature? A How hot or cold a medium is measured by a thermometer. Q If the medium is colder, does sound travel faster or slower? A slower Q If a medium is more elastic, will sound travel faster or slower? A faster Q What type of medium is most elastic, solids, liquids, or gases? A solids are most elastic Q If a medium is more dense, does sound travel faster or slower? A slower Q Does sound travel faster or slower at high altitude than at ground level? A Sound travels slower at high altitude because it is colder.