1. The SI unit of energy and work done is joule(J)
2. Work done
2.1. Object moves the same direction as the force
2.2. A force(push or pull) acts on the object
3. Is the ability to do work
4. Energy cannot be created or destroyed
4.1. It can only be converted from one form to another
5. Types
5.1. Light energy
5.1.1. Give off as a form of radiation(Exp.Light bulb,Sun)
5.1.1.1. Heat to kinetic energy to electrical energy
5.1.1.1.1. The steam from heat water can be used to heat homes and buildings and to generate electricity
5.1.1.1.2. extract poisonous substance like hydrogen sulfide,the flow patterns of rainwater may be affected
5.2. Kinetic energy
5.2.1. an object has due to its motion(Exp. moving ball)
5.3. Thermal energy(Heat)
5.3.1. Transfer from a hotter object to a colder object by radiation,convection or conduction
5.4. Sound energy
5.4.1. Allows us to hear and communicate due to movement of air particles
5.5. Chemical Potential energy
5.5.1. Stored in a substance that can be release in the future to do work(Exp. food,battery)
5.6. Gravitational Potential energy
5.6.1. An object has due to its position above ground
5.7. Electrical energy
5.7.1. Allows electrical appliances to work
6. Source of energy
6.1. Non-Renewable
6.1.1. Limited and will ran out one day
6.1.2. Fossil Fuel(formed by remains of dead plants and animals)
6.1.2.1. carbon dioxide produced,cb2 traps heat
6.1.2.2. causes global warming
6.1.2.3. Power vehicles
6.2. Renewable
6.2.1. Biofuel
6.2.1.1. fuel for motor vehicle
6.2.1.2. Produce Carbon Dioxide
6.2.2. Unlimited supplies
6.2.3. Geothermal energy
6.2.4. Hydroelectric energy
6.2.4.1. GPE to kinetic energy to electrical energy
6.2.4.1.1. supply electrical energy to households and fatories
6.2.4.1.2. Dams prevent the flow of sediments and nutrients down rivers
6.2.5. Solar energy
6.2.5.1. Light energy to electrical energy
6.2.5.1.1. produce electricity
6.2.6. Wind Energy
6.2.6.1. kinetic energy to electrical energy
6.2.6.1.1. provide electricity for household and research stations,especially remote areas
6.2.6.1.2. significant no. of birds and bats to die
6.2.7. Nuclear energy
6.2.7.1. nuclear fission is used to heat water in steam.The steam turns the turbines to generate electricity