#5036 Daily Warm-Ups: Nonfiction Reading teacher Created Resources #5036 Daily Warm-Ups: Nonfiction Reading Warm-Up
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21 The Human Brain #5036 Daily Warm-Ups: Nonfiction Reading 62 ©Teacher Created Resources Warm-Up Check Your Understanding / 4 Name ______________________________________________ 1. According to the passage, most rain starts to fall as snow but melts to rain on the way down in most of the world except a. the desert. c. the city. b. the tropics. d. Antarctica. 2. When does the heaviest snowfall usually occur? a. when the temperature is near 0°F b. when the temperature is as cold as the North Pole c. when the temperature is just about freezing d. when the temperature is above 50°F 3. About how much air is in snow? a. 90 percent c. none b. 10 percent d. 100 percent 4. Which of the following would be the best title for the passage? a. “How Snowflakes Are Formed” c. “Ice and Snow” b. “Facts About Snow” d. “The Heaviest Snowfall” Snow is composed of ice crystals. These crystals fall from clouds in cold weather when the air is too cold to melt the ice crystals into rain. In most of the world outside the very hot tropics, most rain starts to fall as snow but melts to rain on the way down. The heaviest snowfalls occur when the air temperature is close to the freezing point at 32°F. For this reason, more snow falls on the northern United States than at the North Pole because it is too cold at the North Pole for snow to fall. Snow can be as much as 90 percent air. For this reason, snow helps to keep the ground warm and protect some plants from extreme cold. Because so much of the snow is composed of air, it takes about ten inches of snow to equal the amount of water in one inch of rain. All snowflakes are six-sided crystals, with some occasional needles or columns. One farmer and amateur scientist photographed thousands of snowflakes through a microscope. He was trying to find two identical flakes. Neither he nor anyone else ever has. Snow often melts slowly because the white color reflects sunlight away. The most snow in a single storm in the United States was 189 inches. It occurred at Mount Shasta, California, in February 1959. Antarctica is buried in an average of two-and-a-half miles of snow. Scientifically Speaking Download 10.24 Kb. Do'stlaringiz bilan baham: |
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