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It contrasts “cold light” with cold slowing the reaction and warm hands intensifying the glow, then compares glow-in-the-dark paint using phosphorescence to store energy from light. 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There is no battery inside, no bulb, and no switch to flip. When you touch the glowing stick, it doesn't feel hot at all, even though it shines like a tiny neon sign. So how does a simple plastic tube make light out of thin air?  \nThe secret starts the moment you snap that stick and hear a quiet crackle. Inside the plastic tube sits a thin, fragile glass tube, and each holds  \na different chemical. Bending the stick shatters the glass and lets the two chemicals mix, which sets off a reaction that releases energy as light. Scientists call this trick chemiluminescence, a long word that simply means \"making light with chemistry. \"  \nBecause that light comes from a chemical reaction instead of heat, a glow stick can shine while staying cool to the touch. This is why it is called \"cold light,\" and it explains a puzzle many kids have noticed on chilly nights. Have you ever seen a glow stick go dim in the cold and shine brighter in warm hands? Heat speeds the reaction up while cold slows it down, so warming a stick makes it glow harder, and popping one in the freezer can save its glow for later.  \nSnapping chemicals is not the only way to make objects glow after dark. Glow-in-the-dark paint on stars, stickers, and toys works differently, soaking up light like a sponge soaks up water. The paint stores energy from a lamp or the sun, then slowly leaks it back out as a soft green shine, a process called phosphorescence. That is why you have to \"charge\" those plastic stars under a light before they will glow on your bedroom ceiling.  \nThere is one more Halloween glow worth knowing, and it makes no light of its own at all. Reflective tape on costumes and trick-or-treat bags bounces a car's headlights straight back to the driver, helping keep walkers safe in the dark. Unlike aglow stick or a painted star, the tape only shines when light hits it and instantly disappears when the light moves away. So the next time your green glow stick lights up your candy, remember you are holding a chemistry experiment that lives right in your fist!  \nHow Glow Sticks Glow  \nName:  \n\n| Solve each problem.\u003Cbr>Use the article to answer the question.\u003Cbr>1) What is the main idea of the second paragraph?\u003Cbr>A. A tiny battery inside the tube powers a small green bulb.\u003Cbr>B. Glow sticks store sunlight during the day and release it at night.\u003Cbr>C. Reflective tape bounces headlights back toward a car's driver.\u003Cbr>D. Snapping a glow stick mixes two chemicals that react and give off light. |  |  |  |  | Answers\u003Cbr>1.  \u003Cbr>2.  \u003Cbr>3.   |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| 2) How does reflective tape behave when a light moves away from it?\u003Cbr>A. It slowly leaks out the light it had stored.\u003Cbr>B. It keeps glowing softly for several more minutes.\u003Cbr>C. It instantly stops shining because it makes no light of its own.\u003Cbr>D. It grows brighter as the reaction inside speeds up. |  |  |  |  | 4.  \u003Cbr>5.  \u003Cbr>6.   |  |  |  |  |  |\n| 3) What does the word \"chemiluminescence\" mean in the article?\u003Cbr>A. Making light with chemistry. B. Bouncing headlights back to a\u003Cbr>driver.\u003Cbr>C. Heating a wire until it glows. D. Storing sunlight for later use. |  |  |  |  | 7.  \u003Cbr>8.   |  |  |  |  |  |\n| 4) What is the purpose of reflective tape on a trick-or-treat bag?\u003Cbr>A. It mixes chemicals so the bag makes cold light.\u003Cbr>B. It bounces headlights back to drivers to help keep walkers safe.\u003Cbr>C. It stores sunlight so the bag glows a soft green.\u003Cbr>D. It heats up so the bag stays warm at night. |  |  |  |  | 9.  \u003Cbr>10.   |  |  |  |  |  |\n| 5) Why must you \"charge\" glow-in-the-dark stars before they will glow?\u003Cbr>A. The stars must reflect a car's headlights to shine.\u003Cbr>B. The paint must soak up light energy before it can leak it back out.\u003Cbr>C. The stars must be warmed to speed up their reaction.\u003Cbr>D","cbCaiu4qidKdoLVa","https://ap.wps.com/l/cbCaiu4qidKdoLVa","pdf",78746,"English","# Solve each problem\n## Main idea and meaning\n## Reflective tape and cold light\n## Glow-in-the-dark paint comparison","[{\"question\":\"What is the main idea of the article?\",\"answer\":\"The article explains how different Halloween items make people see light in the dark, focusing on glow sticks and related effects.\"},{\"question\":\"How do glow sticks stay cool while shining?\",\"answer\":\"Glow sticks produce light from a chemical reaction instead of heat, so they can glow while remaining cool to the touch.\"},{\"question\":\"Why does warming a glow stick make it shine brighter?\",\"answer\":\"Heat speeds up the chemical reaction that releases light, while cold slows it down.\"}]","How Glow Sticks Glow - Solve Each Problem | PDF",1790807483,18]