1) How does the radiation (energy) of an electromagnetic wave travel? a) in a straight line b) at a right angle to the medium c) going forward from the source and spreading out. 2) All stars give off electromagnetic energy. a) True b) False 3) The purpose of all waves is to change the matter it passes through. a) False b) True 4) Which EM wave has the most radiation(energy)? a) x-rays b) gamma rays c) radio waves d) ultraviolet waves e) microwaves f) infrared waves 5) Electromagnetic waves have to move through a medium to transfer energy. a) True b) False 6) Which EM wave has the least amount of radiation(energy)? a) gamma rays b) radio waves c) microwaves d) infrared e) x-rays f) visible light 7) As the wavelengths of the EM waves gets shorter/microscopic, what happens to the amount of radiation (energy)? a) nothing the radiation/energy stays the same in all the waves b) the amount of radiation/energy decreases c) the amount of radiation/energy increases 8) Humans had to figure out how to make electromagnetic waves. a) True b) False 9) The EM waves with the LONGEST wavelengths are a) microwaves b) radio waves c) infrared waves d) visible light e) ultraviolet rays 10) Weather maps are made using  a) radio waves b) microwaves c) infrared waves 11) This type of thermometer uses which EM wave? a) radio waves b) microwaves c) infrared waves d) visible light 12) To vibrate the water molecules inside the food, microwaves must do this inside the oven. a) Refract b) Diffract c) Reflect 13) Your cell phone uses these two EM waves to make a call to someone across the country. a) radio waves & microwaves b) radio waves & gamma rays c) infrared and microwaves 14) All EM waves from our Sun reach you and me. a) True b) False 15) Visible light is made up of color frequencies. Which color frequency has the longest wavelength? a) yellow b) violet c) blue d) indigo 16) Sunscreen should be worn outside to protect you from which EM wave? a) infrared waves b) visible light c) ultraviolet rays 17) This electromagnetic wave goes through your skin to your bones/solid parts inside your body, for doctors to look at your insides. a) gamma rays b) x-rays c) microwaves 18) The EM waves that are used to sterilize our water at school and your dentist's tools that they stick in your mouth. a) microwaves b) infrared waves c) ultraviolet rays 19) Ultraviolet rays won't damage your skin or eyes. a) True b) False 20) Gamma rays can cause cancer and kill cancerous cells. a) True b) False 21) All animals can only see visible light, like humans. a) False b) True 22) The 3 EM waves we can feel as heat. a) microwaves, infrared waves, visible light b) infrared waves, visible light, ultraviolet rays c) visible light, ultraviolet, x-rays 23) Ultraviolet rays are used at airports to look inside the luggage. a) True b) False 24) In order for visible light to get separated into its' different light frequencies, this must happen. a) refraction b) diffraction 25) If you dug up a box, that was very old and sealed, which EM wave could you use to "look" inside it without opening it up? a) gamma rays b) microwaves c) x-rays d) ultraviolet rays 26) The Sun is the only natural source of EM waves on Earth. a) True b) False 27) Sunscreen is the only form of protection against ultraviolet rays. a) True b) False 28) Electromagnetic waves come from human technology and the stars a) True b) False 29) Which electromagnetic wave is the only one we can see? a) microwaves b) radiowaves c) visible light 30) A flashlight and your eye use which property a) reflection b) diffraction c) refraction 31) Rainbows happen because visible light gets slowed down and separated by a) refraction b) reflection c) diffraction 32) You are exposed to UV rays from the sun on a cloudy day. a) True b) False 33) Sunscreen with an SPF of at least 30 should be worn and reapplied according to directions on the container. a) True b) False

Electromagnetic Waves

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