1. Schindewolf Intermediate School 8 th grade Answers to Computer Lab Activity

2. Question #1 Waves in water are called “transverse” waves! Waves in water are called “transverse” waves!

3. Question #2  The lowest point on a wave is called a “trough”.  Yes- Like a pig trough- only NOT!

4. Question #3  A compression wave is the type of wave a slinky will generate. This is also known as a “longitudinal” wave.  Notice the difference between a transverse and a longitudinal wave in the picture….

5. Question #4  In a longitudinal wave, the particles can be smushed together- only that’s not very Scientific so we call it a “compression”. Look at the picture-You WILL have to know this for your test!

6. Question #5  The opposite of smushed together (compression) is spread apart. We call spread apart a “rarefaction”. Look at the picture again-  I promise this is on the test!! Trust me- I’ve seen the test! AND it was on TAKS last year!

7. Question #6  Light travels in a “transverse wave” NOT a compression waves.

8. Question #7  Earthquake waves are called “Seismic” waves.

9. Question #10  Sound waves are “longitudinal” waves. This is important!! You must know…

10. Question #8  Electromagnetic waves CAN travel through the vacuum of space. They do NOT need a medium. This is awesome for us-Otherwise you couldn’t text and we wouldn’t get sunshine!!

11. Question #9 The high point on a wave is called the “crest” The high point on a wave is called the “crest”

12. Question #11  Sounds above 20,000 Hz are called “ultrasonic”.  REMEMBER SOUND WAVES ARE…Longitudinal  P.S. Did you know waves are considered part of Physics?

13. Question #12  The distance from the middle of a wave (resting point) to the trough OR the crest is the amplitude.  Increasing the amplitude increases the POWER of a wave- Like a guitar!

14. Question #13  The intensity of sound is measured in “decibels”  Check out this chart showing sound decibels. Some occupations are considered High Risk for hearing loss because of sound decibels. The higher the decibel-the louder the noise!

15. Question #14  There are 3 bones in your ear!! The are the “hammer, stirrup and anvil”. Circle all 3  There is a lot of research to suggest that YOUR GENERATION may end up deaf in your 30’s and 40’s as a result of constant headphone usage!

16. Question #15  All waves transfer “energy.” Here are some examples of how waves affect you every day!!

17. Definitions- Pick 4 for your footnotes!  Wave- Transfer of energy  Amplitude- Distance from the resting line to the highest OR lowest point on a wave  Crest- The highest point on a wave  Trough- The lowest point on a wave  Compression Wave- A longitudinal wave like sound with side to side motion.  Transverse Wave- A wave with up/down motion like water and light.  Rarefaction- A point on a longitudinal wave where particles are spread apart.  Compression- A point on a longitudinal wave where particles are close together