THERMAL ENERGY QUIZ

Food is kept in a cool-box which uses two ice packs to keep it cool.

​Where should the ice packs be placed to keep all the food as cool as possible?

• ​both at the bottom of the box

• both at the top of the box

• one at the front and one at the back of the box

• one on the left and one on the right of the box

What is the main process by which heat moves through the water?

• Convection

• Conduction

• Radiation

• Evaporation

Which process involves convection?

• bread toasting under a grill

• energy from the Sun warming a road surface

• hot air rising to the top of a cool room

• thermal energy transfer through a copper bar

What is the difference between evaporation and boiling ?

• Evaporation releases heat. Whereas boiling results In cooling.

• evaporation is slower, occurs only from the surface of the liquid, does not produce bubbles, and leads to cooling. Boiling is faster, can occur throughout the liquid, produces lots of bubbles, and does not result in cooling.

• Evaporation is faster , doesn’t occur from the surface of the liquid and doesn’t produce bubbles. Boiling is slower and can’t occur throughout the liquid and produces lots of bubbles And results in cooling.

Thermal energy is measured in

• joules (J)
• newtons
• watts
• volts

Definition of conduction

• Conduction is the process of heat transfer through a vacuum
• Conduction is the process of heat transfer through a material without any movement of the material itself.
• Conduction is the process of heat transfer through radiation
• Conduction is the process of heat transfer through convection

When does radiation take place ?

• While baking a cake
• When energy is emitted as particles or waves.
• During a solar eclipse
• When water freezes

Which material is a good conductor of heat?

• Wood

• Plastic

• Metal

• Glass

What is a coastal breeze ?

• A coastal breeze is a wind that blows from the sea towards the land.
• A coastal breeze is a type of storm that occurs near the coast.
• A coastal breeze is a wind that blows from the land towards the sea.
• A coastal breeze is a warm current that flows along the coast.

What type of heat transfer is shown in the following picture ?

• Convection

• Conduction

• Radiation

• Condensation