Energy 7

What units are used to measure energy?

• Watts (W) and kilowatts (kW)

• Grams (g) and kilograms (kg)

• Calories (cal) and kilocalories (kcal)

• Joules (J) and kilojoules (kJ)

Which are known as energy stores?

• Thermal

• Electricity

• Chemical

• Kinetic

• Light

Which are methods of transferring energy? (choose 2)

• Electrical

• Waves (light and sound)

• Gravitational potential

• Elastic potential

• Kinetic

What units are used to measure power?

• Watts (W) and kilowatts (kW)

• Grams (g) and kilograms (kg)

• Calories (cal) and kilocalories (kcal)

• Joules (J) and kilojoules (kJ)

Which of the following are non-renewable energy resources?

• Coal

• Oil

• Solar

• Geothermal

• Biomass

Which of the following are renewable energy resources?

• Gas

• Oil

• Coal

• Hydroelectricity

• Tidal

How is power(W) calculated?

• energy (J) X time (s)

• time (h) x price (per kWh)

How is cost calculated?

• power (kW) x energy (J) x time (h)

• power (kW) x time (hours) x price (per kWh)

• power (W) x energy (J) x price (per kWh)

What does a power rating tell you?

• How much energy is transferred per second.

• How much energy is transferred per minute

• Cost of use per minute

• Cost of use per second

Energy use is calculated in Kilowatt hours (kWh).

What is a kWh?

• the amount of energy transferred by a 100kW device in a minute

• the amount of energy transferred by a 1kW device in a minute

• the amount of energy transferred by a 1kW device in an hour

• the amount of energy transferred by a 10kW device in an hour