Crater have been found in Australia, Africa, and Canada. ie Suattered more than

Question

Crater have been found in Australia, Africa, and Canada. ie Suattered more than a l. CFaters larger than Barringer Meteorite TOPIC QUESTIONS Each topic question refers to the topic of the same number. 16. (a) Describe the parts of a comet. (b) What causes a comet to have a tail? Why does the tail always point away from the sun? (c) Describe the orbit and period of most comets. (d) Describe the comet explorations that took place in 1985-86. (e) De- scribe the composition of comets: 17. (a) Describe the general size, shape, and orbit of asteroids (b) How might asteroids have originated? 18. (a) Distinguish between a meteoroid and a meteor. (b) Why do meteor showers occur? Name and give the dates of several meteor showers. 19. (a) What is a meteorite? (b) Name and describe three types of meteorites. (c) What is unvabout Antarctic meteorites? n Earth? (b) Describe the 20. (a) Why are im t crate

Explanation / Answer

16.a). Parts of a comet: The parts of a comet are Nucleus, Coma and a tail. Nucleus is a core part, Coma is a layer of cloud with dust. Tail consists of dust and extends away from the sun. b). Causes of comet having a tail: Comet when approaching the sun, experiences increase in temperature where vapor is formed with dust particles from inside forming a tail which is farhter away from the sun. c).Orbit and period of most comets: The period of comets is usually 200 years or less and the orbit of the comet is elliptical. d). Comet explorations that took place in 1985-86:   Sakigake in 7th january,1985, by Japan Giotto in 2nd july 1985 by European space agency Suisei by japan in 19th august 1985

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