Class VII

Color and texture that is poor reflector of radiant heat is
  1. shiny and black
  2. dull and black
  3. shiny and white
  4. dull and white
Transfer of thermal energy without any flow of medium is known as
  1. Conduction
  2. Convection
  3. Radiation
  4. Wind
Sun emits
  1. low ultraviolet rays
  2. high ultraviolet rays
  3. low infrared waves
  4. high infrared waves
A perfectly empty space without air is known as
  1. vacuum
  2. Wind
  3. Atmosphere
  4. Exosphere
Global warming also causes
  1. extreme weather and climate changes
  2. extreme cold in summers
  3. skin cancers
  4. skin burns
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