#5036 Daily Warm-Ups: Nonfiction Reading teacher Created Resources #5036 Daily Warm-Ups: Nonfiction Reading Warm-Up
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DAILY 6
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- Warm-Up Check Your Understanding
30 Making Maple Syrup ©Teacher Created Resources 105 #5036 Daily Warm-Ups: Nonfiction Reading Warm-Up Check Your Understanding / 4 Name ______________________________________________ 1. From the context of the passage, which word is the best synonym for meniscus? a. molecule c. bubble b. attraction d. tension 2. Which natural force allows the meniscus to form? a. the attraction of water molecules to each other c. water bugs walking on water b. the evaporation of water d. gravity 3. Which of the following would be a good title for the passage? a. “Why Water Is Wet” c. “How a Meniscus Is Formed” b. “Walking on Water” d. “Why Water Spills” 4. What would happen if water molecules weren’t attracted to each other? a. People would be able to float easier. b. No meniscus would form on a glass of water. c. Many water insects would be unable to walk on water. d. both b and c You may have done this at the kitchen table when no one was looking. You filled a glass up to the brim with water to see how far you could fill it before it spilled. Then you kept pouring the water, and it didn’t spill—at least not right away. Don’t try this at the table. Take it outside where the spilled water can just evaporate. Fill a glass with water until it is exactly even with the lip of the container. Then slowly and carefully pour a tiny stream of water into the full glass. Keep your eyes level with the lip of the glass. Do you see a kind of bubble above the lip? This bubble of water is called a meniscus. It is formed because molecules of water have a strong attraction to each other. This is the same kind of attraction that magnets have. The bubble you see happens because of something called surface tension. This is what allows some insects to walk on water. It also helps you to float on water or swim. You can feel the surface tension when you draw your hand through water. The resistance of the water is created by the attraction of water molecules. A single drop of water has 1,700,000,000,000,000,000,000,000 (1.7 septillion) molecules. And every molecule is attracted to every other molecule. The next time someone pours a glass of water and it begins to spill over, tell the person his or her meniscus is leaking. Don’t forget to explain what you mean! Did You Know? Download 10.24 Kb. Do'stlaringiz bilan baham: |
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