Science Cup Grade 8

The longitudinal

wave consists of,,,,,,,,,,,,,,,,

• compressions and rarefactions.

• compressions and crests.

• troughs and rarefactions.

• crests and troughs.

Water waves are transverse waves because the particles of the medium ...............

• vibrate perpendicular to the direction of wave propagation.

• do not vibrate.

• don't need a medium to propagate through.

• vibrate along the direction of wave propagation.

All of the following are transverse waves except ...........................

• water

• light

• sound waves.

• radio

Rarefaction is the area at which the medium particles ...................................

• don't vibrate.

• are too close to each other.

• are faraway from each other.

• vibrate up and down.

Give reasons for

Light can travel through free space.

Give Reason Light waves are considered as electromagnetic waves.