Class VII

Radiation is prevented by
  1. glass walls
  2. silver paint on glass walls
  3. black paint on glass walls
  4. metal walls
Movement of cooler air from sea to land is known as
  1. Sea breeze
  2. Land breeze
  3. Forward breeze
  4. Reverse breeze
An example of conductor of heat is
  1. paper
  2. cloth
  3. air
  4. aluminum
Use of thermograph in medicine is
  1. to identify bacteria
  2. to identify infected tissues
  3. to kill infected cells
  4. to identify damaged parts of organs
When hot air rises
  1. cooler air takes its place
  2. it cools down and falls back
  3. it forms clouds
  4. it condenses
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