Fossil fuels are nonrenewable  resources because they

• take millions of years to form
• are easily replaced
• are in high demand
• don't pollute the air

Besides coal and natural gas, another fossil fuel  is

• petroleum/oil
• biomass
• electricity
• uranium

All of the following are renewable except

• uranium
• solar
• hydropower
• food crops (biomass)

According to the graph, what sector is the greatest user of energy?

• industry
• commercial
• transportation
• residential

When energy is transferred, which store of energy aways increases?

• kinetic energy

• potential energy

• thermal energy

• mechanical energy

Energy is measured using which unit?

• Grams
• Meters
• Watts
• Joules

A solar cell is used to recharge a battery. The solar cell produces 0.80 W of electrical power.

The cell is 20% efficient.

What is the power input of the sunlight onto the solar cell?

• 0.16 W

• 4.0 W

• 8.0 W

• 16 W

A lamp has a power input of 5.0 W. It wastes 1.0 W of power heating the surroundings.

What is the efficiency of the lamp?

• 20%

• 50%

• 80%

• 120%

What is carbon capture ?

• Trapping fossil fuels to stop them being burned and polluting the atmosphere

• A computer system to work out how much carbon dioxide is produced by coal fuelled power stations

• The capture of harmful carbon dioxide emissions for safe storage deep underground

A hot drink has...

• Kinetic Energy

• Heat Energy

• Thermal Energy

• Nuclear Energy