Class VII

In cold climates, building gets cold because of excess escape of
  1. heat
  2. radiations
  3. waves
  4. rays
Another medical use of thermal imaging cameras is that, they can
  1. identify cancer cells deep in the body
  2. identify bacteria in the vessels
  3. identify viruses in the skin tissues
  4. identify diseases of heart
Loss of heat in winter is a lot of waste of
  1. fuel
  2. electricity
  3. power
  4. energy
An example of good insulator of heat is
  1. iron
  2. wood
  3. gold
  4. zinc
Infected tissues are mostly
  1. warmer than normal ones
  2. cooler than normal tissues
  3. big in size
  4. irregular in shape
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