Class VII

In a thermograph, heat is identified by
  1. different sizes of lines on the photograph
  2. different shapes on the photographs
  3. different colors on the photographs
  4. different densities on the thermograph
Heat cannot flow by these means because there is no
  1. wind
  2. air
  3. vacuum
  4. energy
Loss of heat in winter is a lot of waste of
  1. fuel
  2. electricity
  3. power
  4. energy
In cold climates, building gets cold because of excess escape of
  1. heat
  2. radiations
  3. waves
  4. rays
In civil use, thermal imaging cameras can
  1. identify temperature of roads
  2. identify heat distribution in buildings
  3. cool down the temperature of roads
  4. identify the heat released by each car
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