Wavelength, amplitude and frequency
Grade 8 Science Worksheet - Challenge Me
Circle the best answer, or write your answer on the line.
Sound travels about 343 m/s in air at 20 °C. A speaker plays a 343 Hz note. What is the note's wavelength in air, Ari?
Sound travels about 343 m/s in air at 20 °C. A speaker plays a 686 Hz note. What is the note's wavelength in air, Bo?
Sound travels about 343 m/s in air at 20 °C. A speaker plays a 245 Hz note. What is the note's wavelength in air, Esme?
In the wave graph, which wave carries more energy, Jun?
- Wave Q, with the bigger amplitude
- Wave P, with the longer wavelength
- Wave P, since it is faster
- Both the same, since they share a rope
In the wave graph, which wave has the higher frequency, Kira?
Use the picture in question 4.
- Neither has a frequency
- Wave P, with the longer wavelength
- Wave Q, with the shorter wavelength
- Both the same, since they share a rope
In the wave graph, wave P has a frequency of 2 Hz. Both waves move at the same speed. What is wave Q's frequency, Luz?
Use the picture in question 4.
- 1 Hz
- 2 Hz
- 8 Hz
- 4 Hz
Milo says pond ripples carry the pond's water to the edge. Agree or disagree?
- Agree: the water rides along with each ripple
- Disagree: they carry energy, not the water
- Agree: bigger ripples move faster
- Agree: amplitude is crest to trough
Pia says a higher-pitched note has a longer wavelength in the same air. Agree or disagree?
- Agree: higher notes push the air along faster
- Agree: higher notes travel faster
- Agree: higher frequency means longer waves
- Disagree: higher frequency, shorter wavelength
People hear sounds from about 20 Hz to 20,000 Hz. A dog whistle plays at 25,000 Hz. Can Ren hear it?
- Yes; 25,000 is close to 20,000
- Yes, if it is loud enough
- Yes; dogs and people hear the same sounds
- No; it is above 20,000 Hz
At 20 °C, sound travels about 343 m/s in air and about 1,481 m/s in water. Where does it travel faster, Tala?
- Sound can't travel in water
- In water
- In air, since air is thinner
- The same in both