UNIT 5 ENERGY

Mark the correct sentence

• Potential energy + mechanical energy =

  Kinetic energy

• Mechanical energy + kinetic energy =

  Potential energy

• Potential energy + kinetic energy =

  Mechanical energy

Is the movement of small charged particles called electrons

• Radiant energy

• Potential energy

• Mechanical energy

• Electrical energy

This energy is stored in chemical compounds

• Mechanical energy

• Electrical energy

• Chemical energy

• Kinetic energy

Chemical energy is released...

• in chemical compounds

• in chemical reactions

• in chemical objects

• in objects with potential energy

Mark the correct sentence

• Sound energy is produced when particles vibrates, and these rays travel to our ears

• Sound energy is produced when particles vibrate and this energy travels to our ears (in rays)

• Sound energy is produced when particles vibrate and this energy travels to our ears (in waves)

This energy is also called HEAT

• Chemical energy

• Thermal energy

• Sound energy

• Light energy

Cold things have more thermal energy than hot ones

• True

• False

What does the law of conservation of energy say?

• Energy can't be created, but it can be destroyed.

• Energy can't be destroyed, but it can be created.

• Energy can't be created or destroyed, but it can be transformed

Which type of energy sources are better for the environment?

• Renewable

• Non-renewable

Non-renewable energy sources...

• Can be replaced

• Can't be replaced