Science news.DIRECTIONS: Read the Science News section on pages 4 to 7. Then, test your knowledge by filling in the letters of the correct answers below. 1. Giant pandas eat as many as--kilograms of bamboo each day. (A) 15 (B) 27 (C) 38 (D) 84 2. An atom of the newly discovered element has--protons in its nucleus. (A) 53 (B) 118 (C) 200 (D) 201 3. Which of the following about the newly discovered element is false? (A) It was made by combining one atom of calcium with an atom of californium californium (kăl`ĭfôr'nēəm) [from California], artificially produced, radioactive metallic chemical element; symbol Cf; at. no. 98; mass no. of most stable isotope 251; m.p. about 900°C;; b.p. . (B) The element is not found in nature. (C) If confirmed, it would be the heaviest element ever. (D) Scientists have already named the element Mendelevium mendelevium (mĕndəlāv`ēəm), artificially produced radioactive chemical element; symbol Md; at. no. 101; mass no. of most stable isotope 258; m.p. 827°C;; b.p. and sp. gr. unknown; valence +1, +2, +3. . 4. Particles called--flow from a negatively charged area in a cloud to a positively charged area to form lightning. (A) protons (B) neutrons (C) electrons (D) plasma 5. The most lightning-prone state in the U.S. is (A) Florida. (B) Texas. (C) New Jersey. (D) Oklahoma. 6. Most spiders secrete silk from openings in the abdomen called (A) sphincters. (B) spin nodules Nodules A small mass of tissue in the form of a protuberance or a knot that is solid and can be detected by touch. Mentioned in: Leprosy . (C) spinnerets. (D) spindle glands. 7. Scientists recently discovered that the Costa Rican zebra tarantula tarantula (tərăn`chələ), name applied chiefly to several species of the large, hairy spiders of the families Theraphosidae and Dipluridae of North and South America. The body of a tarantula may be as much as 3 in. (7. can ooze silk from nozzles on its (A) mouth. (B) feet. (C) eyes. (D) bead. 8. Saturn's rings are made of (A) liquid water. (B) ice and dust. (C) beams of light. (D) asteroids This is a list of numbered minor planets, nearly all of them asteroids, in sequential order. As of late September 2007 there are 164,612 numbered minor planets, and many more not yet numbered. Most asteroids are ordinary and not particularly noteworthy. and comets. 9. Scientists expect to find--in the newly discovered rings that surround Saturn. (A) moons (B) alien life (C) a black hole (D) dwarf planets 10. A new device senses the risks of getting a stress fracture stress fracture n. A fatigue fracture of bone caused by repeated application of a heavy load, such as the constant pounding on a surface by runners, gymnasts, and dancers. by detecting--that travel through microcracks in--. (A) soundwaves, nerves (B) vibrations, bones (C) pulses, muscle tissues (D) vibrations, blood vessels Blood vessels Tubular channels for blood transport, of which there are three principal types: arteries, capillaries, and veins. Only the larger arteries and veins in the body bear distinct names. ANSWERS 1. c 2. b 3. d 4. c 5. a 6. c 7. b 8. b9. a10. b |
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