Heat

............ is movement of energy from a warmer object to a cooler object.

• Energy

• Electricity

• Heat

• Conductor

Which options are better thermal conductors

• a silver spoon

• air bag

• wooden table

• copper pot

................... is an optical illusion caused by passing of light through cool air to warm air.

Conduction is the transfer of thermal energy between ..........................................

In which way does thermal energy travels the fastest?

• Convection

• radiation

• conduction

• convection and radiation

transfer of energy in moving gases or liquids is called ........

• Convection

• Conduction

• Radiation

• Insulator

we put a spoon in a hot tea cup and the spoon gets hot after a few minutes. this type of thermal energy transfer?

• Convection

• Conduction

• Conductor

• Thermal conductor

How many types of thermal energy production have you learned in your book?

• 2

• 4

• 3

• 10

Which one of thermal energy production ways can be bad in machines?

• Conduction

• Flow of electricity

• Mixing and burning

• Friction

Why do the LED light bulbs use less energy.

• because they produce more light less heat

• because they produce less light more heat

• because they produce equal amount of light and heat

• because they just produce light and no heat