#5036 Daily Warm-Ups: Nonfiction Reading teacher Created Resources #5036 Daily Warm-Ups: Nonfiction Reading Warm-Up
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11 Bioluminescence at Sea #5036 Daily Warm-Ups: Nonfiction Reading 52 ©Teacher Created Resources Warm-Up Check Your Understanding / 4 Name ______________________________________________ 1. What two charges of electric energy are necessary to create lightning? a. two positive charges c. two negative charges b. a neutral charge and a positive charge d. a negative charge and a positive charge 2. From the context of the passage, which of the following should you stand next to during a thunderstorm? a. a huge tree c. a tractor in an empty field b. a flagpole d. none of the above 3. Which of the following is a good example of a topic sentence? a. paragraph one, last sentence c. paragraph two, first sentence b. paragraph one, first sentence d. both b and c 4. Is this sentence correct? Lightning is created when a positive charge on the ground is attracted to a negative charge at the bottom of a thundercloud . a. yes c. sometimes b. no d. never A lightning bolt is a huge electric spark created in a thundercloud. The spark leaps across the sky. Water droplets and ice crystals crash together in a thundercloud. They create static electricity. There are two electrical charges in the cloud. Lighter positive charges whirl around at the top of a cloud, and heavier negative charges are at the bottom of the cloud. Lightning is created when a positive charge from the ground and a negative charge at the bottom of the cloud jump together. Then electrical energy is released. A flash of lightning can contain one billion volts of electricity. Lightning heats the area around it even hotter than the sun. Forked, zigzag, and sheet lightning are the most common shapes. About 1,000 people a year are injured by lightning, and about one hundred people a year are killed. People die from burns, shock, or heart attacks. To protect yourself from lightning during thunderstorms, try to get inside a building. If you can’t find protection, stay away from trees, especially from a single tree. A tree or pole is the highest point. It will attract lightning because it provides the shortest path to the ground. Do not hold umbrellas or other metal objects because they attract the electric charge. Lightning does strike the same place twice and often many times. For example, tall structures like skyscrapers and towers are struck many times a year. As long as you know what to do when there’s lightning in the sky, you will be safe. Scientifically Speaking Download 10.24 Kb. Do'stlaringiz bilan baham: |
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