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1) Heat of an object is known as a. thermometer b. thermal energy c. temperature d. pressure
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2) The temperature of horse shoe is approximately a. 200 °C b. 700 °C c. 1000 °C d. 2000 °C
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3) Waves that pass through the glass walls of greenhouse are in the form of a. gamma rays b. x-rays c. infrared waves d. radio waves
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4) From earth, sun is about a. 100 million km away b. 125 million km away c. 150 million km away d. 175 million km away
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5) Quilts and jackets keep us warm by a. trapping air b. preventing release of heat from our body c. heating itself up d. maintaining body temperature
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6) By placing our hand above a hot object, we can feel heat because a. it is releasing heat b. our hand is releasing heat c. our hand is cooling down d. our hand is heating up
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7) The objects that are cooler than other objects gain heat from a. sun b. surroundings c. stove d. smoke releasing fuels
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8) The color and texture of poor absorber of radiant heat is a. black and shiny b. black and dull c. white and shiny d. white and dull
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9) The cool air which comes from sea to land is known as a. sea breeze b. land breeze c. forward breeze d. reverse breeze
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10) Compared to hot air, cool air is a. light b. good conductor c. more strong d. more dense
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11) Ideal temperature for warm bath water is usually between a. 30 °C b. 40 °C c. 50 °C d. 60 °C
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12) Just like light, radiant heat can also be a. reflected b. turned off c. used in LED d. effective
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13) In hot places, well insulated house stays a. warm b. hot c. cool d. normal
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14) Infrared radiation can pass through a. thick wall b. glass c. water d. log
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15) Thermal energy travels in a. one way b. two ways c. three ways d. four ways
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16) Warm air rises because it is a. more dense than cool air b. equally dense as cool air c. less dense than cool air d. completely dense
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17) At night, sea water gets a. warm than land b. cool than land c. both a and b d. very hot
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18) Earth is warm by heat energy coming from a. sun b. moon c. universe d. space
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19) When warm air rises over sea, its previous position is replaced by a. more warm air from sea b. cool air from sea c. more cool air from land d. warm air from land
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20) The number of walls of a thermos is a. 1 b. 2 c. 3 d. 4
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