A. look like falling stars

B. are really pieces of rock or metal

C. burn up as they shoot through the air

D. All the above

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  1. The following are the atmospheric zones above the surface of the earth:A) Troposphere B) IonosphereC)…
  2. The planet that is known as earth's twin is
  3. A person cups his hand around the mouth when shouting. Why?
  4. The theory that the earth constituted the centre of the universe around which the sun and the planets…
  5. An electric fan converts
  6. Nuclear fission process means
  7. A balloon ruled with hydrogen will
  8. The earth satellite Aryabhatta was put in orbit by India on
  9. X-rays are used
  10. When a steel ball is placed on the surface of mercury, it does not sink because
  11. Which of the following apparatus is used in the electrolysis of water?
  12. A lactometer la used to
  13. Raindrops assume a spherical shape because or
  14. In hot climatic conditions, the buildings are painted white because
  15. Photo-electric cells convert
  16. Frictional force acts in
  17. The end product in the uranium disintegration series is
  18. Electromagnets are used in
  19. Of the following which has got the highest frequency?
  20. Metals are good conductors of heat because
  21. The period of a geostationary (synchronous) satellite orbiting the earth over the equator la
  22. The velocity of sound in a medium is
  23. Enriched uranium means
  24. The aneroid barometer uses
  25. Lightning conductors are made of
  26. The period of oscillation of a simple pendulum depends upon
  27. Velocity of sound in high altitudes is low because at such a height
  28. The coil of an electric heater is made of
  29. The planet that moves fastest around the sun is
  30. It is more difficult to walk on ice than on a concrete road because