Worked example
A plucked rubber band moves back and forth while making sound. What motion is this?
Answer & why
Answer: vibration
Repeated back-and-forth motion is a vibration.
Grade 1 · Science
Connect sounds with vibrations
Use observations to connect sound production with vibrating materials.
6 authored questions + worked example
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All questions
All 6 authored questions for this skill.
Question 1
A tuning fork’s prongs move rapidly back and forth. What is occurring?
- a change of color
- plant growth
- vibration
- melting
A hint
A vibration is a repeated back-and-forth motion.
Answer & why
Answer: vibration
The prongs repeatedly move away from and back toward their rest positions.
Question 2
A speaker cone moves back and forth as music plays. Which process is observed?
- plant growth
- vibration
- melting
- a change of color
A hint
A vibration is a repeated back-and-forth motion.
Answer & why
Answer: vibration
The cone’s back-and-forth motion moves surrounding air.
Question 3
A student feels a gentle buzz at the throat while humming. Which process in the voice helps produce the sound?
- plant growth
- vibration
- a change of color
- melting
A hint
A vibration is a repeated back-and-forth motion.
Answer & why
Answer: vibration
Vocal folds vibrate during humming; the vibration can be felt at the throat.
Question 4
A ringing bell’s metal moves back and forth very slightly. Which process explains its sound production?
- vibration
- plant growth
- a change of color
- melting
A hint
A vibration is a repeated back-and-forth motion.
Answer & why
Answer: vibration
Small rapid vibrations in the bell transfer energy into the air.
Question 5
A plucked rubber band moves back and forth while making sound. What motion is this?
- plant growth
- vibration
- melting
- a change of color
A hint
A vibration is a repeated back-and-forth motion.
Answer & why
Answer: vibration
Repeated back-and-forth motion is a vibration.
Question 6
A drum surface moves back and forth after it is struck. Which process helps make the sound?
- vibration
- plant growth
- melting
- a change of color
A hint
A vibration is a repeated back-and-forth motion.
Answer & why
Answer: vibration
The drum surface vibrates and transfers this motion to surrounding air.