What is the first picture you get in your head when i say the word radiation? Umm, that's what I thought. A nuclear bomb does produce radiation, but I'm thinking on a less violent level, like a fire pit, or oven, something like that. Scientists call it, electromagnetic radiation. All this means is what type of energy wavelength it is. We know the Sun puts out lots of electromagnetic radiation, we can feel it on our faces. Or we stay out in the Sun too long in the summer and we get a Sun burn. Radiation waves from your oven, or microwave are the same as the radio waves that we need to listen to our favorite music. Radiation waves from your oven have more energy than radio waves and that's why we can feel the heat and can cook things like cookies and pizza in the oven. Energy in a wave is kind of a different way to look at phenomenon around us. Heat has characteristics. We measure heat with a thermometer, but we know by experience that heat can move. Have you ever sat by a campfire and after a couple of minutes your face is lava hot and your pants are burning your legs so you turn around to cool off? Yep, radiation (heat energy) waves were heating up your body. Energy (heat) always, that's always, I repeat always moves from a hot object to a cool object. From hot to cold. A cold object is dense, the molecules are fixed and vibrating slightly. When heat (energy) is put near or on the cold, dense object, the cold molecules begin to expand as they warm up and move about more. As the molecules warm they begin to jiggle and move against each other. Whenever the warmer molecule bumps against a colder molecule, the colder molecule begins to warm up. Thermal energy can make a very dense object, less dense. A cold pot put on a warm burner will be ready to pop popcorn in under 3 minutes. The energy (heat) under the pot can transfer energy through the pot molecules rather quickly and right into the popcorn molecules! What if we have a warm soda on the kitchen table. How do we cool it down? We add ice. You might think that the ice is cooling the warm soda. Really, the warm soda is warming up the ice! As the warm soda works to warm up the ice, the soda loses energy and becomes colder. When the soda is cooled the heat energy has been completely used up and your soda is just perfect to drink. What is radiation again? Thermal energy moving in waves to heat up molecules and pass the energy along to other molecules. Can you feel it? Oh yeah!
7 Comments
Sadie
1/18/2018 03:36:13 pm
Good job on the blog Mrs. Taylor!!! I like the coke photo!!!
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Sadie
1/18/2018 03:37:29 pm
I also forgot to say I was first!!! YAY my first time!!!
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AIDAN
1/18/2018 04:07:16 pm
[the beginning of the blog] so true
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MaryGrace/Fred
1/18/2018 05:46:31 pm
I agree with Aidan and I JUST CAN'T STOP WATCHING THE POPCORN!!! SO SATISFYING!!!
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gandalf
1/18/2018 08:36:04 pm
i beleive the first picture is so satisfying I probably was watching it for 7 minutes. the popcorn pic was probably the same effect. I found that the last pic was probably the most funny pic (and for all you people who like to take grammer mistakes to Mr. Sheerer here, "i aint the one who slit him throat.") i must say that typing that grammer mistake toke 5 minutes of my time that I could of used to explain what some idioms mean and my opinion on them. you know i am going to do just that.
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Ally b.
1/18/2018 09:38:10 pm
Good job on the blog today Mrs.Taylor! Love the popcorn!
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Mrs. TaylorI love science! Everything about the world is interesting and never boring. I love to study plants, animals, insects, and people. My favorite subjects are my students who are the most unique organisms on the planet! Categories |