speed-of-sound-copy

# Interactive video lesson plan for: Speed of Sound (copy)

#### Activity overview:

Sounds travels at different speeds in different media. Created by David SantoPietro.

Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

Tagged under: Speed sound,bulk modulus,density,sound

9 questions

1. Pre-Assessment:
Based off of what you learned last week, can you recall what a "medium" is when we are discussing a wave?
(00:00:00)

2. Check out the particles of the wave as the speaker is making sound. Why do you think they're changing? (00:00:07)

3. The stiffer the medium = the .... (00:00:21)

4. Why do you think the molecules act like this when there is a stiffer medium? (00:00:28)

5. Pair shair with your shoulder partner:
What is your schema to the word "density".
(00:00:35)

6. What do you think? Does sound travel faster through iron or slower? Share with your shoulder partner! (00:01:53)

7. Which of the following do you THINK sound travels the quickest in? (00:00:02)

8. Make a connection to what we learned in the last unit to what was just described. How do you believe the energy within the air changes how quickly sound can travel? (00:03:04)

9. Share with your shoulder partner three things you learned in this video! (00:03:18)

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