Schindewolf Intermediate SchoolSchindewolf Intermediate School

88thth grade grade

Answers to Computer Lab ActivityAnswers to Computer Lab Activity

Question #1Question #1

• Waves in water are called Waves in water are called ““transverse”transverse” waves! waves!

Question #2Question #2

The lowest point on a wave is called a The lowest point on a wave is called a “trough”.“trough”.

Yes- Like a pig trough- only NOT!Yes- Like a pig trough- only NOT!

Question #3Question #3

A compression wave is A compression wave is the type of wave a the type of wave a slinky will generate. slinky will generate. This is also known as a This is also known as a “longitudinal”“longitudinal” wave. wave.

Notice the difference Notice the difference between a transverse between a transverse and a longitudinal wave and a longitudinal wave in the picture….in the picture….

Question #4Question #4

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

Question #5Question #5 The opposite of smushed The opposite of smushed

together (compression) is together (compression) is spread apart. We call spread spread apart. We call spread apart a apart a “rarefaction”. “rarefaction”. Look Look at the picture again- at the picture again-

I promise this is on theI promise this is on the test!! test!! Trust me- I’ve seen the test! Trust me- I’ve seen the test! AND it was on TAKS last AND it was on TAKS last year!year!

Question #6Question #6

Light travels in Light travels in a “transverse a “transverse wave” NOT a wave” NOT a compressioncompression waves.waves.

Question #7Question #7

Earthquake waves are called Earthquake waves are called “Seismic”“Seismic” waves. waves.

Question #10Question #10 Sound waves are “longitudinal” waves. This is Sound waves are “longitudinal” waves. This is

important!! You must know…important!! You must know…

Question Question #8#8

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

Question #9Question #9

• The high point on a The high point on a wave is called the wave is called the “crest”“crest”

Question #11Question #11

Sounds above 20,000 Hz Sounds above 20,000 Hz are called are called “ultrasonic”.“ultrasonic”.

REMEMBER SOUND REMEMBER SOUND WAVES ARE…WAVES ARE…LongitudinalLongitudinal

P.S. Did you know waves P.S. Did you know waves are considered part of are considered part of Physics?Physics?

Question #12Question #12 The distance from the The distance from the

middle of a wave middle of a wave (resting point) to the (resting point) to the trough OR the crest is trough OR the crest is the amplitude.the amplitude.

Increasing the Increasing the amplitude increases amplitude increases the POWER of a the POWER of a wave- Like a guitar!wave- Like a guitar!

Question #13Question #13 The intensity of The intensity of sound is sound is measured in measured in “decibels”“decibels”

Check out this Check out this chart showing chart showing sound decibels. sound decibels. Some Some occupations are occupations are considered High considered High Risk for hearing Risk for hearing loss because of loss because of sound decibels. sound decibels. The higher the The higher the decibel-the decibel-the louder the noise!louder the noise!

Question #14Question #14

There are 3 bones in your There are 3 bones in your ear!! The are the ear!! The are the “hammer, stirrup and “hammer, stirrup and anvil”. anvil”. Circle all 3Circle all 3

There is a lot of research There is a lot of research to suggest that YOUR to suggest that YOUR GENERATION may end GENERATION may end up deaf in your 30’s and up deaf in your 30’s and 40’s as a result of constant 40’s as a result of constant headphone usage!headphone usage!

Question Question #15#15

All waves transfer All waves transfer “energy.” “energy.” Here Here are some examples are some examples of how waves affect of how waves affect you every day!!you every day!!

Definitions- Pick 4 for your footnotes!Definitions- Pick 4 for your footnotes! Wave- Transfer of energyWave- Transfer of energy Amplitude- Distance from the resting line to the Amplitude- Distance from the resting line to the

highest OR lowest point on a wavehighest OR lowest point on a wave Crest- The highest point on a waveCrest- The highest point on a wave Trough- The lowest point on a waveTrough- The lowest point on a wave Compression Wave- A longitudinal wave like Compression Wave- A longitudinal wave like

sound with side to side motion.sound with side to side motion. Transverse Wave- A wave with up/down motion Transverse Wave- A wave with up/down motion

like water and light.like water and light. Rarefaction- A point on a longitudinal wave where Rarefaction- A point on a longitudinal wave where

particles are spread apart.particles are spread apart. Compression- A point on a longitudinal wave Compression- A point on a longitudinal wave

where particles are close togetherwhere particles are close together