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Unit 3

Waves

QuestionAnswer
Binary code represents different letters by using a _______________ of the numbers ___ and ___ . pattern 1's 0's
Cell phones receive __________________ information over long distances and change it to voice. digitized
What would be the best model for a wave? a. tub with water and gently add a plastic toy b. throw a ball of paper from the top of the stairs c. roll toy cars down a ramp d. attach a rope to a door knob and shake it up and down d.
What makes a picture clearer? more pixels fewer pixels more pixels
Morse code and binary code both use ____________ to represent letters in a written message. patterns
You look at a soccer ball. You can see it because light from the _________ reflects _______ the soccer ball and _______ your eyes. sun off into
Which would be the best way to send a coded message with a whistle? a. one long, loud blow b. a very high pitched blow c. a series of different lengths and pitches of blows c
Which would be the best way to send a coded message with a flashlight? a. random flashes of the light b. a series of long and short flashes of the light c. one long flash of the light b
Which would be better for sending a message on a cloudy day? whistle flashlight both both
Which would be better for sending a message on a sunny day? whistle flashlight both whistle
Which would be better for either cloudy or sunny? whistle flashlight whistle
Which object can send and receive messages, allow messages to be seen in the dark, and is easy to carry with you? cell phone radio headphones cell phone
Waves with higher pitched sounds are ____________ together than waves with lower pitched sounds. closer
Which wave shows the highest pitched sound? Scroll down and click on targets to see the image. Then scroll down and click on flashcards, to bring you back to the question. 3
Which sound has the most energy? 1, 2, 3, or 4 Scroll down and click on targets to see the image. Then scroll down and click on flashcards, to bring you back to the question. 4
Which wave has the longest wavelength? 1, 2, 3, or 4 Scroll down and click on targets to see the image. Then scroll down and click on flashcards, to bring you back to the question. 2
Which wave has the shortest wavelength? 1, 2, 3, or 4 Scroll down and click on targets to see the image. Then scroll down and click on flashcards, to bring you back to the question. 3
Waves with lower pitched sounds are ____________ apart than waves with higher pitched sounds. farther
Which wave shows the lowest pitched sound? Scroll down and click on targets to see the image. Then scroll down and click on flashcards, to bring you back to the question. 2
Created by: Mrs. Furlong
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