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Questions:

1. Which material muffled sound the best?

The cloth

2. Which material muffled sound the worst?

The newspaper

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Which material will muffle sound best?

Group 3: The towel

Group 4:the cloth

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Experimental Variables Variable: Group 3

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Experimental Variables Variable: Group 3

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Group 3:

Identify the following:

Control Variable: The distance and we kept everything in the box before testing.

Independent Variable: the material that covers the soures of sound.

Dependent Variable: the loudness of the sound.

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Click the form and record the results of the activity.

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(Prediction: This is a guess about what you think will happen before you experiment.)

Group 1: the towel will muffle the best the newspaper will be loudes

Group 2:we think the towel will muffle the best and paper will muffle the worst

Group 3: The towel will muffle the sound and the news paper will be the loudest.

Group 4:the towel will muffle sound best and news paper will muffle sound worst

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1. Set up the sound level meter near a speaker producing a constant sound.

2. Cover the speaker with different materials (bubble wrap, cloth, newspaper).

3. Use the sound level meter to record the sound levels (in decibels) for each material.

4. Repeat for three trials for each material.

5. Record your results after each trial.

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Sound level meter (decibel meter)

Electric stopwatch

Bubble wrap

Cloth

Newspaper

Shoe box with lid

Sound level meter

Notebook and pencil for recording results

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Conclusion:

Group 1: The cloth muffled the best and the newspaper muffled the worst.

Group 2:

Group 3: The news paper muffled the sound the best and cloth is the loudest sound.

Group 4: cloth muffled sound best and bubble wrap muffled

sound the worst

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1. Do you think this investigation is a fair test? Explain.

No,because we keep making noise when we were testing.

2. Could you identify the noise pollution in your comunity

Factorys working

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Identify the Following:

1. Control Variable:distance from source of sound

2. Independent Variable:the materials

3. dependent Variable:volume of sound