Forms of energy

What is the principle of conservation of energy?

• Energy can be created and destroyed.

• Energy can only be transformed from one form to another.

• Energy is a constant that does not change.

• Energy can be transferred but not transformed.

What form of energy is used when a person hits a tennis ball with a tennis racket?

• Chemical energy

• Electrical energy

• Mechanical energy

• Nuclear energy

How is sound energy produced?

• By vibrating objects that create sound waves.

• By the movement of air particles only.

• Through electrical signals in devices.

• By the reflection of light waves.

What is kinetic energy?

• The energy of an object at rest.

• The energy of an object in motion.

• The energy stored in an object due to its position.

• The energy released during a chemical reaction.

What is thermal energy?

• Thermal energy is the energy that comes from the temperature of matter.

• Thermal energy is the energy stored in chemical bonds.

• Thermal energy is the energy associated with the motion of electrons.

• Thermal energy is the energy released during nuclear reactions.

What type of energy is transferred to thermal energy?

• Chemical energy

• Nuclear energy

• Electrical energy

• Mechanical energy

What kind of energy does a device that uses electricity utilize?

• Mechanical energy

• Chemical energy

• Electrical energy

• Nuclear energy

What two forms of energy are produced by a campfire?

• Chemical energy and sound energy

• Heat energy and light energy

• Kinetic energy and potential energy

• Electrical energy and magnetic energy

What is an example of energy transformation?

• A light bulb converting electrical energy into light energy.

• A car engine converting chemical energy into mechanical energy.

• A solar panel converting light energy into electrical energy.

• A battery storing electrical energy for later use.

What is the definition of mechanical energy?

• Mechanical energy is the energy associated with the motion and position of an object.

• Mechanical energy is the sum of potential energy and kinetic energy in an object.

• Mechanical energy is the energy stored in chemical bonds of a substance.

• Mechanical energy is the energy that is transferred through heat.