9781422284964

Try It Yourself

Earplugs are one device that can be used to protect your hearing. But which types are the best? Compare and contrast some of the different available types to see which blocks the noise but allows you to still hear. Materials: • Different types of earplugs, including foam ones, earmuffs, and ones that are inserted into the ear • MP3 player of iPod • Quiet room

1. Devise your hypothesis.

2. What is your procedure? List the steps.

3. How many trials will you do? What is your controlled variable? Your indepen- dent variable?

4. Predict what your results will be.

5. Explain what you think you would see.

6. Draw a conclusion.

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