Gr 4. First Term Final Revision

. A .............................. stores chemical energy and can convert it into electrical energy.

• Sun

• Battery

• Generator

A .............................. is a device that changes energy of motion into electrical energy.

• Generator

• Turbine

• Boiler

. ............................... is a material that releases energy when it burns.

• Turbine

• Fuel

• Generator

A ............................... is a device that spins as the gas flows and changes heat energy into energy of motion.

• Generator

• Turbine

• Boiler

................................. is the process of burning fuel to produce heat and light.

• Combustion

• Boiling

• Freezing

................................. is the primary source of energy of almost all fuels.

• Coal

• Sun

• Wind

A ......................... is something made for a particular purpose.

• fuel

• Device

• Wind

Coal, petroleum, natural gas, and wood are kinds of ........

• batteries

• devices

• fuel

Energy in fuel comes from

............................ change.

• electric

• kinetic

• chemical

During combustion, substances in the fuel combine with ................... in the air.

• oxygen

• Nitrogen

• Carbon dioxide