8. Think about all of the sounds you hear around you every day. Besides
human voices, what are some other examples of things that create
sound vibrations?
Required
1 point
1
Question 3
3.
9.
Olivia has a vacuum pump that she's using in an experiment. Inside the jar she's placed an alarm clock with a bell. Olivia can hear the bell ringing. She's about to turn on the vacuum pump to get rid of all the air inside the jar. Will the sound of the bell still be abile to get to Olivia's ears? Explain your answer.
Required
1 point
1
Question 4
4.
10. The pictures below show two different sounds, seen through an oscilloscope. One of them is the sound of a flute (high-pitched) and the other is the sound of a tuba (low-pitched). Which is which? Explain how you know.
Required
1 point
1
Question 5
5.
11. The person in the drawing is at the bottom of the Grand Canyon. They yell, "Hey!!" and then hear their echo a couple of seconds later. Given what you know abour sound, what do this happening when a person hears their echo? Use words or drawings on the picture to explain what is happening.
