1. Sources of Energy (week 1)
1.1. Renewable sources of energy
1.1.1. ~ Non-renewable sources of energy cannot be replenished once used. For example: fossil fuels (coal, oil, natural gas) and nuclear fuels (such as uranium)
1.2. Non'renewable sources of energy
1.2.1. ~ Renewable sources of energy are continually replenished. For example: hydro power, wind, sunlight, biofuel (wood)
2. Potential and Kinetic energy (week2)
2.1. Potential energy
2.1.1. ~ Potential energy is energy that is stored in a system, such as in a stretched rubber band, a weight balanced on the edge of a table, a cell (battery), fuel
2.2. Kinetic energy
2.2.1. ~ Kinetic energy is the energy that a body has when it is moving, such as when a rubber band snaps back, a weight falls off a table, wind blows, water falls, a vehicle moves, current flows through a circuit (electricity)
2.3. Potential and kinetic energy in systems
2.3.1. [a system is a set of parts working together] ~ Potential and kinetic energy are involved in - mechanical systems - thermal (heating) systems - electrical systems - biological system.
2.4. Law of conservation of energy
2.4.1. ~ Energy can neither be created nor destroyed but can be converted from one form to another