SOUND

Any object can make a sound ................................. when it vibrates

• sound

• Wave

• vibrates

• object

• vibrates

A ............................... is a movement about a fixed point.

• wave

• vibration

The ................... of sound is related to the movement of the vibrating object

• vibrating

• loudness

........................passes through the air as the particles move to and fro.

• energy

• sound energy

This ............................................ number of waves per second is called the

• waves

• frequency

which is called frequency ?

• The number of waves that pass a fixed point in unit time.

• cycles or vibrations undergone during one unit of time by a body in periodic motion.

what is sound in science ?

• vibration that propagates as an audible wave of pressure, through a medium such as a gas, liquid or solid.

• Sound is a type of energy made by vibrations.

what is sound in physics ?

• vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear.

• A vibration that propagates as an audible wave of pressure, through a medium such as a gas, liquid or solid.

what percentage of sound is dangerous for A human to hear ?

• Loud noise above 120 dB can cause immediate harm to your ears.

• Noise above 70 dB over a prolonged period of time may start to damage your hearing.

What are two ways to measure a sound wave ?

• in units called decibels.

• Sound energy travels in waves and is measured in frequency and amplitude.