Grade 4 Science - Term 2 Revision

1.1 According to the graph, through which medium will a sound wave travel slowest?

• iron

• glass

• oxygen

• water

1.2. Choose two conclusions that are supported by the data shown in the bar graph.

• Sound waves travel at different speeds in different mediums.

• Sound waves travel faster through air than through water.

• Sound waves travel faster through water than through air.

• Sound waves travel at the same speed in different mediums.

A sound wave moving through water will move (slower / faster) than a sound wave traveling through helium.

A sound wave moving through glass will move (slower / faster) than a sound wave traveling through water.

Tia moved the ruler up and down in the pan and observed the wave pattern labeled “X.” Next, Tia moved the ruler up and down faster and observed the wave pattern labeled “Y.” 2.1. Based on the evidence from the wave patterns, what will most likely happen if Tia moves the ruler up and down at a slower pace?

• The amplitude will increase.

• The wavelength will increase.

• The frequency will increase.

• The crests will increase.

Using the word bank, fill in the blanks to complete the sentence

As the __________________________ of a wave increases, the __________________________ of a wave decreases.

• frequency / wavelength

• crest / amplitude

• wavelength / frequency

• amplitude / frequency

chouse the part of the picture that represents the wavelength.

• A

• B

• D

• E

Which heading in the table describes wavelength?

• Wave

• Number of crests

• Distance between crests

• Height of crests

Which is the correct option

• The height of the crest represents the frequency / amplitude / wavelength of a wave.

• frequency

• amplitude

• wavelength

Which is the correct option

• Based on the evidence in the table, the height of the wave is not dependent on the wave speed / frequency

• wave speed

• frequency