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What is the main idea of this chapter?
The author wrote “Your remote control uses infrared waves to communicate with your TV.” What does “communicate” mean in this quote?
Sabiha wrote “Scientists found that heat sources send out infrared waves, too.” What does “heat sources” mean in this quote?
What does the picture of the dog show?
How much faster are ultra–violet waves than infrared waves?
Which conclusion makes sense given the information in this chapter?
Were there any ideas or words that were unclear in this chapter?