How the Ear Hears

Lab Brief #1

🎯 Your mission

Master the concept. Use it tomorrow.

⚡ The twist

What the body does in one minute is wilder than any cartoon.

What you'll learn

Ears detect sound waves that vibrate the eardrum. Tiny bones in the middle ear amplify vibrations, and the cochlea in the inner ear converts them into nerve signals.

Key words

cell
The tiny building block that makes up all living things.
neuron
A tiny cell that carries messages in the brain and body.

Make a hypothesis first

Guess: how does the body solve this problem?

Say your guess out loud — then find out if you were right.

Step 1 of 3 · Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 of 3 · Observe

Draw a detailed diagram of what you observe.

Step 3 of 3 · Record

Write a conclusion: what did your results show? Did they match your prediction?

Question 1 of 3

What converts sound waves into nerve signals?

How sure are you?😐 maybe

Question 2 of 3

How do muscles work to move bones?

How sure are you?😐 maybe

Question 3 of 3

How many bones does an adult human have?

How sure are you?😐 maybe

Mind = blown

🐙 An octopus has 9 brains and 3 hearts.

Nice work!

You got 0 of 3 right.

Next: The Brain: Control Center All lessons

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✨ More to explore

🌍 Where you see this in real life: This is why plants grow toward windows and why scabs form.

🏆 Stretch challenge (try it this week): Watch a plant or pet for 5 minutes today and write down what you noticed.

👨‍👩‍👧 For the dinner table: “Tell me something you noticed about your own body today.”

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