READ AND REVISE

1. which planet is closet to the sun-Mercury

1. which planet rotates  on its axis from east to west-Venus

2. The day in which the sun is near to the earth-Perihelion

3. what is the International date line-180degree longitude

  1. What is the relation between solar day &sidereal day-Solar day  is longer than sidereal day

5. the mass of earth is about what time than that of moon-81 time

6. How much of the surface of the moon is visible from earth-59%

7. What is the unit of measurement of distance of star from the earth-Light Year

8. Light from the nearest star reaches the earth in what year-4.3 year

9. which comet appears every 76 year-Hally’s

10. The moon’s period of revolution with reference to the sun is equal to one synodic month.

11. We always see the same face of the moon because it text equal time for both revolution around the earth and rotation on its own axis.

12. What is a tidal bore-A high tidal  wave moving up stream in the mouth of a river

13. Antarctic circle-66 degree S latitude

14. Longest day in Australia -22december

15. The difference in the duration of day and night increases as –one move from the equator to the polls.

16. Equinoxes occur on March 21 and September 23.

17. The standard time of India is 51/2 ahead of green which Time.

18. The south polls experience continues light at the time of winter solstice.

19. Which planet takes the longest time to go once around the sun?-Neptune

20. One desirous of traveling by the shortest route should follow the longitudes.

21. A day is added when one crosses 180 degree longitude from west to east.

22. The order of the layers in the atmosphere, in terms of volume, is nitrogen and oxygen.

23. Most of the weather phenomena take place in the troposphere.

24. Which layer of the weather atmosphere maintains and almost uniform temperature?-Stratosphere.

25. The thickness of the troposphere increase in summer.

26. Which gas in the atmosphere absorbs ultraviolet rays?-Ozone.

27. The fall in air temperature with increasing in elevation is known as –Lapse rate.

28. Where the doldrums belt is located-Near equator  .

29. What is the name given to wind blowing from sub tropical high pressure region to the equator –Trade wind?

30. Horse latitude apply to 30 degree to 35 degree –N and S latitude.

31. The stratosphere is said to be ideal for flying –Jet aircraft.

32. What is incoming solar radiation known as – Isolation?

33. The velocity of wind is governed by –pressure gradient.

34. Why does sky look blue –Because the blue light is scattered by dust particles.

35. Name the instrument use for humidity- Hygrometer.

36. How much pressure is exerted  by the atmosphere at sea level –One KG per square CM

37. The water content in the atmosphere increase as –As temperatures increases.

38. What is great circle-Equator

39. What is meant by midnight sun –Sun remains visible at local midnight at poles.

40. What is cyclone –A low pressure system with anti clock wise wind in the northern hemisphere?

41. What is anticyclone-High pressure system With clock wise wind in the northern hemisphere.

42. What is jet stream – An upper wind system with very high velocity in certain part of atmosphere?

43. What are tornados –A very low pressure center?

44. What is vapour pressure-Pressure only due to vapour in the air.

45. What is dew point-The temperature at which air is fully saturated is called dew point.

46. What is cloud –Condensed moisture in the form very minute water droplets and ice particles?

47. What is fog-A low stratus cloud

48. What is Orographic Rain –Rain fall is caused due to the presence of the mountain in the way of wind.

49. What is Gulf Stream –A warm ocean current in the Atlantic ocean.

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