class 8 th bridge course

Heat is transferred through solids by ..................... .

• conduction and convection

• radiation only

• radiation and convection

• conduction only

Heat is transferred through copper and iron by ..................... .

• convection

• radiation

• conduction

• all the above

Heat is transferred by convection through ....................... .

• gases only

• liquids only

• gases and liquids

• solids only

The freezer of the fridge is found at the top of the fridge, because the cold air ........................... .

• falls down to be replaced by hot air

• is a bad conductor of heat

• is a good conductor of heat

• none of the above

Heat transfers from a heater by ....................... .

• conduction and radiation

• radiation and convection

• conduction and convection

• radiation only

Energy of motion is which type of energy?

• Potential
• Kinetic
• Sound
• Gravitational

Which of the following is an example of thermal energy?

• A light bulb

• The movement of a car

• The digestion of food

• Heat from a fire

Energy from the sun is called...

• Conduction

• Rays

• Radiation

• Heat

Which has more gravitational energy?

• A snowboarder at the top of a mountain

• A person laying on the beach

Which has the most kinetic energy?

• A caught baseball

• A turtle swimming

• A parked car