Wavelength, amplitude and frequency
Grade 8 Science Worksheet
Circle the best answer, or write your answer on the line.
A cork floating in a ripple tank bobs up and down 10 times in 5 seconds. What is the frequency of the ripples, Ari?
A cork floating in a ripple tank bobs up and down 16 times in 2 seconds. What is the frequency of the ripples, Bo?
Using the scale, how high is the amplitude of this wave, Kira?
- 20 cm
- 40 cm
- 60 cm
- 30 cm, the top of the scale
In the wave graph, which pair gives the amplitude and then the wavelength, Luz?
Use the picture in question 3.
- 20 cm and 60 cm
- 60 cm and 20 cm
- 40 cm and 60 cm
- 20 cm and 30 cm
Waves travel along a rope at the same speed. Milo starts shaking it faster, a higher frequency. What happens to the wavelength?
- It gets longer
- It stays the same
- The amplitude doubles instead
- It gets shorter
Two notes travel through the same air. One has a higher pitch, a higher frequency. Which has the shorter wavelength, Noah?
- The louder note
- The lower-pitched note
- The higher-pitched note
- Both the same, since they share a speed
Two ripple waves move at the same speed. Wave A has a 3 cm wavelength and wave B a 6 cm wavelength. Which has the higher frequency, Pia?
- Wave A
- Wave B, since longer waves are louder
- Both the same
- Wave B, since its waves are longer
Ren pushes and pulls one end of a stretched slinky along its length. What travels along the slinky?
- Up-and-down crests, like a rope
- Nothing; a slinky can't carry a wave
- The end coils, to the far end
- Bunched-up coils, a squeeze
How is a sound wave in air like a slinky wave, Tala?
- Both are squeezes and stretches moving along
- Both travel faster when they are bigger
- Both carry the air or coils to the far end
- Both move up and down like a rope
Zee pushes the slinky harder, so the coils bunch up more tightly. What has changed?
- The speed: the squeeze moves faster
- The amplitude, so it carries more energy
- The wavelength doubles
- The coils now travel to the far end