First Grade · Science · week 1

Sound is a vibration

Discover that sound is made by vibrations, and feel a vibration in your own throat.

Every sound you hear starts with something moving very fast, back and forth. That fast back-and-forth movement is called a vibration. You cannot always see a vibration, but you can often feel it.

Your own body makes sound with a vibration too. Deep in your throat is a part that shakes when you talk or hum, called your voice box. Today you will feel it shake with your own hand.

📋 For the teacher
Teach it (10–15 min):
  • Sit knee to knee and hum together so your child can feel their own throat and yours at the same time.
  • Say the word "vibration" often this week; it is the one idea every lesson in this unit builds on.
  • Let your child discover the stop-and-start pattern themselves: humming makes buzzing, silence makes no buzzing.
  • If you have a speaker, let your child rest a hand on it during loud music to feel a bigger vibration.
Talk about it:
  • What did your throat feel like while you were humming?
  • What happens to the feeling the moment you stop making sound?
  • Can you think of something else that shakes when it makes a sound?

Mastery looks like: They explain that sound comes from something vibrating and point to a vibration they felt themselves, such as in their throat.

Common stumbles: Thinking sound is just "there" rather than caused by something moving; pressing too hard on the throat and feeling a pulse instead of the voice vibration.

Homework for this lessonType it, write it with a stylus, or print it for pencil & paper.open →
Records attendance + 15 min of Science for this learner.
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