4. Energy Flashcards
What are energy forms?
Energy forms are the different ways in which energy can appear.
What are energy resources?
Energy resources are the different ways of supplying a particular energy form.
What is chemical energy?
Chemical energy is the energy stored in a substance that is released on burning.
Name resources of chemical energy.
Resources of chemical energy include coal, oil, natural gas, peat, wood and food.
What is gravitational potential energy?
Gravitational potential energy is the energy a body contains as a result of its height above the ground.
Give a resource of gravitational potential energy.
Gravitational potential energy is the stored energy in the reservoir of a hydroelectric power station.
What is kinetic energy?
Kinetic energy is the energy of a moving object.
Name resources of kinetic energy.
Resources of kinetic energy include wind, waves and tide.
What is nuclear energy?
Nuclear energy is the energy stored in the nucleus of an atom.
Name resources of nuclear energy.
Resources of nuclear energy include uranium and plutonium.
Name common energy forms.
Common energy forms include heat, light, sound, electrical, magnetic and strain potential.
What does the Law of Conservation of Energy state?
Energy can neither be created nor destroyed, but it can change its form.
Describe the energy changes which take place when you strike a match.
Stored chemical energy in the match head is converted into radiant heat energy and visible light energy.
Describe the energy changes which take place when you stretch a catapult.
Chemical energy from food in your body is converted into kinetic energy in stretching the elastic cord. The kinetic energy is converted into useful strain potential energy and wasted heat energy in the elastic cord.
Describe the energy changes which take place when you ring an electric bell.
Chemical energy in the battery is converted to electrical energy in the wires which is converted to kinetic energy in the hammer. Electrical energy is also converted to wasted heat energy in the wires and gong. Kinetic energy in the hammer is converted into useful sound energy from the gong.
