Science in the news quiz.Directions: Read the late-breaking news in our Science News section on pages 4 to 7. Then test your comprehension skills by answering the questions below. Circle the correct letter. 1 Card-builder Bryan Berg Bryan Berg is a prominent builder of houses of cards on a very large scale. Career Berg broke the Guinness World Record for the World's Tallest House of Playing Cards in 1992 at the age of seventeen, with a tower fourteen feet, six inches tall. stacks cards two or three at a time to create more A. momentum. B. mass. C. glue surface. D. vertical support. 2 Berg uses cards with a rough surface to make the most of A. friction. B. weight. C. inertia. D. the cards' ability to curve. 3 The size of a sound wave is called its A. frequency. B. pitch. C. decibel decibel (dĕs`əbĕl', –bəl), abbr. dB, unit used to measure the loudness of sound. It is one tenth of a bel (named for A. G. Bell), but the larger unit is rarely used. . D. amplitude. 4 Sound frequency is measured in A. meters. B. hertz. C. angstroms. D. decibels. 5 Which statement is true about both Mars and Earth? A. Their orbits around the Sun take the same time. B. They orbit the Sun at about the same speed. C. They have the same climate. D. Their orbits bring them closest together every 10,000 years. 6. How many times its own body length can the froghopper froghopper or spittlebug, small, hopping insect of the order Homoptera. The adult, under 1-2 in. (1.2 cm) long in most species, is triangular in shape and usually gray or dull green to brown. jump? A. 20 B. 40 C. 80 D. 100 7 Froghoppers' short legs are strong because A. the legs act like levers. B. insects have strong legs. C. large amounts of energy are stored in the leg muscles. D. the insect has springy spring·y adj. spring·i·er, spring·i·est 1. Marked by resilience; elastic. 2. Abounding in freshwater springs. spring feet. 8 If the common flea were human size, it could leap over the San Francisco Bay San Francisco Bay, 50 mi (80 km) long and from 3 to 13 mi (4.8–21 km) wide, W Calif.; entered through the Golden Gate, a strait between two peninsulas. Bridge. A. True B. False TAKE IT FURTHER RESEARCH IT Card-stacking champ Bryan Berg has built card structures capable of holding up to four tons of weight! Divide into groups of four or five and hold a class competition: Who can build the strongest structure using only five decks of playing cards playing cards, parts of a set or deck, used in playing various games of chance or skill. The origin of playing cards is unknown, and almost as many theories exist as there are historians of the subject. ? Test strength by placing small weights or everyday objects on top of the structure until it collapses. WEB SEARCH How do sound levels at a rock concert compare with those of a whisper, jet engine, or vacuum cleaner vacuum cleaner, mechanical device using a draft of air to remove dust, loose dirt, or other particulate matter from dry surfaces. It is especially useful on highly textured surfaces, such as carpets and upholstery, that are difficult to clean by wiping or brushing. ? Research the sound levels of five objects or activities online, then create a table that compares the sound levels in decibels. ANSWERS 1. b 2. a 3. d 4. h 5. b 6. d 7. c 8. b |
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