(51) The atmosphere near the earth’s surface is “heated from below.” Which of the following does not significantly contribute to this heating ?
- A. Conduction of heat upward from a hot surface
- B. Convection from a hot surface
- C. Absorption of infrared energy that has been radiated from the surface
- D. Heat energy from the earth’s interior
(52) The temperature at which water boils depends mainly on ?
- A. Air temperatur e
- B. Relative humidity
- C. Air pressure
- D. Air density
(53) “Elephant” large unit of paper measurement equal to 28 by
- A. 23 inches
- B. 25 inches
- C. 28 inches
- D. 31 inches
(54) The top atmosphere of the Earth directly reflects back into space nearly what part of the total amount of sun’s energy coming to it?
- A. 10%
- B. 20%
- C. 30%
- D. 50%
(55) Which of the following is the largest planet?
- A. Neptune
- B. Jupiter
- C. Saturn
- D. Mars
(56) Study of current and past landscapes formation is known as ?
- A. Morphology
- B. Aero logy
- C. Geo- morpholog y
- D. Biology
(57) The most brightest planet amongst the eight planets?
- A. Mercury
- B. Jupiter
- C. Venus
- D. Neptune
(58) Battery was invented by ?
- A. Nicolas Léonard Sadi Carnot
- B. Alessandro Volta
- C. Michael Faraday
- D. Friedrich Bessel
(59) Microphone converts sound energy into ?
- A. Microwaves
- B. Electrical signals
- C. Optical Signals
- D. Heat energy
(60) what are stars mainly made of ?
- A. Balls of gass
- B. Rock
- C. Ice
- D. Light
(61) Approximate age of moon is ?
- A. 4.51 billion years
- B. 4.55 billion years
- C. 4.53 billion years
- D. 4.57 billion years
(62) The vitamin Folate works together with to produce new red blood cells?
- A. Vitamin D
- B. Vitamin A
- C. Vitamin B-12
- D. None of the above
(63) The Mirror used in the Automobiles are ?
- A. Concave
- B. Convex
- C. Plains
- D. Reflective
(64) ‘Bar’ is the unit of ?
- A. Temperatur e
- B. Heat
- C. Atmospheri c pressure
- D. Current
(65) Why normal rain is slightly acidic?
- A. due to presence of dust in air
- B. carbon dioxide and water in clouds react to form carbonic acid
- C. Ozone depletion
- D. All of these
(66) The scientific study of insects is known as ?
- A. Ichthyology
- B. Entomology
- C. Zoology
- D. Botany
(67) The Temperature of the surface of Sun is ?
- A. 5,778 Kelvin
- B. 6,778 Kelvin
- C. 7,778 Kelvin
- D. 9,778 Kelvin
(68) The Sun is at an average distance of about million kilometers away from Earth?
- A. 100 million
- B. 150 million
- C. 200 million
- D. 250 million
(69) For which one of the following is the density maximum?
- A. Ice
- B. Water
- C. Benzene
- D. Chloroform
(70) Inhaled air passes through which of the following in the last?
- A. Bronchiole
- B. Larynx
- C. Pharynx
- D. Trachea
(71) Winter Solstice means ?
- A. longest night
- B. longest day
- C. smallest night
- D. smallest day
(72) Who is the founder of solar system?
- A. Copernicus
- B. Newton
- C. Galileo
- D. Kepler
(73) The study of the weather is called ?
- A. Meteorolog y
- B. Weatherolo gy
- C. Ecology
- D. Geology
(74) Vitamin B is found in ?
- A. Sea Foods
- B. Fruits and Vegetables
- C. Seeds
- D. None of these
(75) During a total solar eclipse there is most likely to be ?
- A. A decrease in the rate of photosynth esis
- B. An increase in the rate of photosynth esis
- C. A decrease in the rate of respiration
- D. No effect on either photosynth esis or respiration