'Air' is

  • thermal conductor
  • thermal insulator
  • electrical conductor
  • an electrolyte

'Thermos' keeps

  • liquids hot
  • liquids cold
  • liquids hot or cold, depending on their temperature
  • liquids at normal temperature

The wind systems are created due to the change in

  • pressure
  • temperature
  • humidity
  • mass

Heat from the sun comes in the form of radiations. These radiations are known as

  • Gamma radiations
  • Infrared radiations
  • Ultraviolet radiations
  • Micro radiations

The warm air rises from the

  • land
  • sea
  • sun
  • trees

When hot air rises

  • cool air takes its place
  • cools down and falls back
  • forms clouds
  • condenses

Light, radiant heat and radio waves travel at the same rate because they are

  • of different density
  • different elements
  • part of electromagnetic spectrum
  • part of energy

When the solar eclipse occurs

  • only heat is cut off
  • only light is cut off
  • heat and light both are cut off
  • none is cut off

All heat 'insulators' are

  • metalloids
  • transition metals
  • non metals
  • metals

The glass walls help to resist the transfer of heat by

  • conduction only
  • convection only
  • radiation only
  • conduction and convection

Comparing hot water bath and horse shoe, more heat is present in

  • horse shoe
  • hot water bath
  • both
  • hot water bottle

The good conduction of heat by metals is due to

  • collision of particles
  • arrangement of particles
  • vibration of particles
  • size of particles

If air is heated, it

  • rises
  • falls
  • compresses
  • gets dense

The circulating movement of air is known as

  • conduction current
  • convection current
  • radiation current
  • air current

To prevent loss of heat through walls, the walls must be

  • insulated
  • conducted
  • painted black
  • painted dull

If a radiator is installed in a room, it warms air by the process of

  • conduction
  • convection
  • radiation
  • warming

If we stir a cup of hot coffee with a plastic spoon, the handle of the spoon will

  • get hot
  • remain cold
  • change its shape
  • remain unchange

The higher the temperature, the

  • more calm vibration in particles
  • less violent vibration in particles
  • more violent vibration in particles

The proportion of heat loss through walls is

  • half
  • one third
  • quarter
  • one fifth

In winter, closed curtains help in keeping a house warm by

  • preventing heat to enter
  • preventing light to enter
  • preventing greenhouse effect
  • trapping air

The excess warming of earth due to greenhouse stimulator is called

  • earth warming
  • CFC warming
  • greenhouse warming
  • global warming

The hotter the object,

  • the more heat absorbed
  • the less heat released
  • the less heat absorbed
  • the more heat released or emitted

Atmosphere of earth acts similarly as

  • light bulb
  • LED bulb
  • pressure cooker
  • greenhouse

Mostly people wear black or dark colored clothes in winter, because dark colors

  • absorb more heat
  • absorb less heat
  • reflect more heat
  • transfer less heat

If we put a metal spoon in hot soup, the handle would get

  • cool
  • hot
  • rusted
  • stuck

White painted roof and walls prevent

  • excess heat loss
  • excess heat absorption
  • excess heat loss and absorption
  • excess heat transfer

Weather is an example of

  • conduction current
  • convection current
  • radiation current
  • air current

Infrared radiations are also called

  • latent heat
  • black heat
  • invisible heat
  • visible heat

By the theory of eclipse, we conclude that

  • light is faster than heat
  • heat travels faster than light
  • both travel at the same rate
  • both travels slower

The transfer of heat in solids from higher concentration to lower concentration in the presence of medium is known as

  • conduction
  • convection
  • radiation
  • excursion
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