Sound It Out

What must occur in order to produce a sound wave?

• Air must blow through a movable object

• Electrical and magnetic field must be present

• Vibrations produced from an object

• Heating and cooling of an object must take place

Which statements about sound are true?

• Sound transfer energy and matter

• Sound transfers energy but not matter

• Sound can only travel is matter is present

• Sound is classified as an electromagnetic wave

• Sound travels as a longitudinal wave

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History tells us that Native Americans trackers were able to identify the location, direction, and cause of sounds they heard traveling through the ground. What special understanding and interpretation was needed to accomplish this?

• Sound travels faster through solids than through gases

• Sound transfers energy through solids and gases.

• Sound cannot travel through a vacuum

• Sound travels faster through air than through the ground.

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How do sound waves travel through the air?

• Sound waves are potential energy that changes into kinetic energy as it travels.

• Sound waves moves compressions of matter from one place to another.

• Sound waves move at right angles to the direction of the wave.

• Sound energy is transferred by conduction (one particle collides with another particle),

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How do you produce a humming sound?

• Air moving in and out of your lungs, vibrates the lining of your mouth.

• Vibrations are created as air moves over your tongue.

• Air vibrates the cartilage in your vocal cords (Adam's apple)

• Air vibrates as it moves through your teeth.

The movement of sound energy moves the same way

• Thermal energy moves through conduction

• Nuclear energy moves through radiation

• Thermal energy moves through convection

• Electromagnetic energy moves through radiation

• Electrical energy through conduction

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