Sound

no. of oscillations per second is called ?

• frequency of oscillation

• hertz

• quintals

• ouioui

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

Ryan makes an instrument from a drinking straw as shown. If he cuts the straw in half, what will happen to the pitch?

• decreases

• it will remain the same

• increases

• 
  there is no sound

What is the lowest frequency a human can hear ? 

• 30 Hz

• 2 Hz

• 20 Hz

• 20,000 Hz

Why is the school library covered with carpet?

• So everyone can make a lot of noise
• to help absorb sounds to keep it quiet
• because it looks good
• to help absorb sounds so it can stay noisy

Sound is a form of? 

• energy
• pitch
• volume

Sound waves travel the FASTEST through _____________.

• gases

• liquids

• solids

• vaccum

High pitch sounds are caused by a ______ vibration

• fast 

• slow

• hard

• sharp

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.

Which of the following is the inverse of time period?

• Amplitude

• Frequency

• Pitch

• Quality