Energy Revision

Which light bulb is more efficient?

• Incandescent globe

• Light-emitting diodes

• Fluorescent light

What are three different types of heat transfer?

• Convection, conduction, insulation

• Conduction, convection, energy transformation

• Conduction, convection, radiation

• Conduction, radiation, kinetic energy

True or false. Air is a good conductor?

• True

• False

Can a potato create electrical energy?

• Yes

• No

Clay is a good....

• Insulator

• Conductor

Grass on a rooftop is an example of a good...

• Insulator

• Conductor

Answer explanation

Some energy efficient buildings are now growing grass on the roof to improve insulation!!

Energy is measured in

• Volts

• Current

• Joules

Sound and light are examples of

• Potential energy

• Kinetic energy

Elastic and chemical energy are examples of

• Potential energy

• Kinetic energy

The saying 'hot air rises' is an example of...

• Conduction

• Convection

• Radiation

• Chemical energy