Energy

What is kinetic energy?

• Potential energy

• The type of energy moving objects have

• The type of energy due to gravity

• Energy stored in food and fuels

Luminous or bright objects give off what kind of energy?

• Potential energy

• Kinetic energy

• Light energy

• Chemical energy

Energy conversion happens when ...

• Energy changes from one form to another

• Energy is efficient

• Energy causes something to do work

• Energy travels a certain distance

Give an advantage of using nuclear energy to generate electricity.

• It doesn't produce greenhouse gases

• It is safe

• It is used widely in our country

• It does produce greenhouse gases

Which figure, 1 or 2, demonstrates a more efficient lamp, and why?

• Figure 1, because a filament lamp is always more efficient

• Figure 2, because most of the energy is used for light, which is the purpose of a bulb

• Figure 1, because most of the energy is used for heat, which is the purpose of a bulb

• They are both as efficient as each other

• Neither are efficient, as a Sankey diagram doesn't tell us anything about energy efficiency

Which appliance listed in the table uses the most electrical energy?

• Coffee maker

• Television

• Kitchen blender

• Dishwasher

Select all the useful forms of energy produced when a television is being used (multiple answers).

• Heat energy

• Light energy

• Sound energy

• Kinetic energy

What is the standard unit of energy?

• gram (g)

• metre (m)

• volt (V)

• joule (J)

When the battery of a mobile phone is being charged, electrical energy is converted to which other form of energy?

• Chemical

• Kinetic

• Sound

• Nuclear

When a mobile phone is used to listen to music, the energy in the battery is converted to which other form of energy?

• Light

• Chemical

• Sound

• Nuclear