SOUND

Which of the following is the inverse of time period?

• Amplitude

• Frequency

• Pitch

• Quality

Sound waves travel the FASTEST through _____________.

• gases
• liquids
• solids

Sound is caused by....

• molecules
• vibrations
• people
• space

What is frequency?

• the number of vibrations per second
• how high or low a sound is
• the loudness or softness of a sound
• the back and forth movement of matter

Sound does not travel in space because

• Space is too far away.
• There is no matter in space.
• Space is the final frontier
• Space has planets.

Speed of light in air is:

• 5100 m s^-1

• 3*10⁸m s^-1

• 330 m s^-1

• 3*10¹⁰ m s^-1

Which of the following would you hear as a low pitched sound? 

• sound wave with a frequency of 50 Hz
• sound wave with frequency of 10,000 Hz
• sound wave with an intensity of 10 dB
• sound wave with an intensity of 100 dB

High pitch sounds are caused by a ______ vibration

• fast 
• slow
• hard
• soft

The volume of a sound is measured in units called ________

• decibels

• liters

• sound waves

If you want to change the pitch of a sound, you have to change the ___

• frequency
• amplitude
• speed
• volume