Grade 8 Sound and space

The number of wavelengths that pass a point each per second is:

• frequency
• period
• longitudinal 
• transverse wave 

• Frequency
• Amplitude
• Wavelength
• Trough

• Crest
• Trough
• Height
• Frequency

Sound is caused by....

• molecules
• vibrations
• people
• space

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.

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

Your __________ vibrate when you talk

• stomach
• lips
• ears
• vocal cords

A sound with a high pitch would have

• a low frequency
• a high frequency
• a low amplitude
• a high amplitude

Frequency is measured in:

• decibels

• Hertz

• meters

• seconds

In which of these types of media will sound travel fastest?

• Solid

• Liquid

• Gas