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Where have we been, and where are we going next?

Slide A

Look at our consensus model. Of the three parts (sound source, medium, and detector), where do you think we have made the most progress?

What questions do we still have on our DQB?

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Making Predictions Discussion

Slide B

Look at our consensus model again. What do you think happens when these kinds of particle compression waves hit people’s ears?

What do you picture is going on inside human ears that allows them to hear different sounds?

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Making Predictions Model

Slide C

Take about 3 minutes to draw and write on your handout what you think is happening in people’s ears to allow them to hear sounds.

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Possible Investigations

Slide D

Turn and Talk

If we want to investigate how our ears work, how could we do that?

What evidence do we need to find to support some of our ideas?

Be ready to share your thoughts with the group.

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Discuss the Ear Exam Video

Slide E

What did you notice during this video?

What structures in the ear remind you of anything we have already investigated?

Where or how could we get more information about how our ears work?

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Information from the Experts

Slide F

Read the interview with �Dr. Lertsburapa and �Dr. Seigel, including the linked videos and websites.

Record your thinking on your Lesson 12 Activity Sheet.

Questions we are still trying to answer:

What is happening inside the human ear that allows it to detect different sounds?
What else is happening in the human body that allows it to hear sounds?

__________________________________________

Notes from the reading and video and animation links:

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Where do we need to explore next?

Slide G

What new questions do we have about these ideas of frequency and amplitude in regard to our hearing?

Wrap up today’s work and plan for next time. Say, So we learned from the reading and we know from our own experience that sounds with a great amplitude can cause hearing damage. We also know that sounds with a high frequency can cause hearing damage. That is interesting--sound waves of larger amplitude and waves of higher frequencies can cause more damage than sound waves of smaller amplitude and lower frequencies.

Ask, What new questions do we have about these ideas of frequency and amplitude in regard to our hearing?

After students share their questions, say, These are very interesting questions, and many of them relate to our DQB. So, when we get together again, let’s investigate this idea of greater amplitude or higher frequency doing more damage. Let’s think about how we might figure out which transfers more energy--sound waves with greater amplitude or sound waves with greater frequency.

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Reading about Animal Hearing

Slide H

Read the article about how elephant and dog hearing compare to human hearing.

Consider using the Online Tone Generator to investigate how well you and your family hear different pitches.