g4 test no.4

Which of the following is a renewable energy resource.....

• Coal.

• Natural gas

• Solar energy.

• Oil.

Which of the following is NOT a renewable energy resource.....

• Wind energy.

• Solar energy.

• Fossil fuels.

• Hydropower.

What energy is used to operate windmills......

• Solar energy.

• Kinetic energy of wind.
  

• Chemical energy.

• Thermal energy

What is the main disadvantage of windmills

• They are expensive to build.

• They depend on wind to operate.

• They produce pollution.

• They are difficult to maintain.

What energy is used to operate watermills.....

• Solar energy.

• Kinetic energy of water.

• Chemical energy.

• Thermal energy.

What is the main function of a solar water heater

• Convert solar energy into electrical energy.

• Heat water using solar energy.

• Generate electricity from water.

• Convert thermal energy into sound energy.

What are the panels of a solar water heater made of.....

• Glass.

• Black pipes

• Solar cells.

• Wind turbines.

What is the input energy for a solar water heater.....

• Electrical energy.

• Solar energy.

• Wind energy.

• Chemical energy

What is the output energy of a solar water heater......

• Electrical energy.

• Thermal energy.

• Sound energy.

• Kinetic energy.