grade 8 2nd term revision

Sound travels fastest in...

• solids

• liquids

• gases

• air

Sound waves travel the slowest through _____________.

• gases

• solids

• liquids

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.

Sound is caused by....

• molecules
• vibrations
• people
• space

How does sound travel?

• Sounds travels in waves
• sound travels slow
• sound travels fast
• sound doesn't travel

Sound moves in a _________.

• Transverse wave
• Longitudinal wave

Area of a longitudinal wave where particles are CLOSE together.

• Compression
• Rarefaction

Area of a longitudinal wave where particles are APART. 

• Compression
• Rarefaction

Which device measures sound waves?

• Oscilloscope
• Stethoscope 
• Radio
• I don't know

___________ measures  how close or  far particles are.

• Amplitude
• Frequency