1. Renewable sources of energy
1.1. are constantly being replenished and do not run out
1.1.1. biomass(charcoal, plant parts, animal waste, food waste)
1.1.2. running water
1.1.3. wind
1.1.4. solar energy(light and heat energy) from the Sun
1.1.5. Geothermal
2. Non-renewable sources of energy
2.1. will eventually be depleted or run out/fossil fuels
2.1.1. coal(solid)
2.1.2. crude oil(petrol, diesel)(liquid)
2.1.3. natural gas(gaseous)
3. Advantages
3.1. Burning fossil fuel
3.1.1. Electricity is generated more reliably as the fuel can be burned when needed.
3.1.2. Uses less land to generate a given amount of electricity
3.2. Using running water, wind or light
3.2.1. Does not produce greenhouse gases and pollutants
3.2.2. Uses renewable sources of energy to generate electricity
4. Disadvantages
4.1. Burning fossil fuel
4.1.1. Produces greenhouse gases and pollutants
4.1.2. Does not use renewable sources of energy to generate electricity
4.2. Using running water, wind or light
4.2.1. Electricity is generated less reliably due to unpredictable weather.
4.2.2. Uses more land to generate a given amount of electricity.
5. What is energy
5.1. Energy is the ability to do work
6. Types of energy
6.1. Potential Energy
6.1.1. Chemical Potential Energy
6.1.1.1. Food
6.1.1.2. Fuels
6.1.1.3. Batteries
6.1.2. Gravitational Potential Energy
6.1.2.1. The energy stored in an object due to its position above the ground
6.1.2.2. F.A. Gravitational Potential Energy
6.1.2.2.1. The mass of the object
6.1.2.2.2. The height of the object above the ground
6.1.2.3. The greater the height/mass of the object, the greater the gravitational potential energy it possesses.
6.1.2.4. An object on the ground has no gravitational potential energy.
6.1.3. Elastic Potential Energy
6.1.3.1. The energy stored in objects which are stretched and compressed
6.1.3.2. F.A. Elastic Potential Energy
6.1.3.2.1. The distance the elastic material is stretched or compressed
6.1.3.2.2. The stiffness of the spring
6.1.3.3. The stiffer the spring, the more elastic potential energy it possesses.
6.2. Kinetic Energy
6.2.1. It is the movement energy in any object that is in motion.
6.2.2. F.A. Kinetic Energy
6.2.2.1. The mass of the moving object
6.2.2.2. The speed of the moving object
6.2.3. The greater the mass/speed of the object, the greater the kinetic energy the object possesses.
6.2.4. An object that is stationary has no kinetic energy
6.3. Light Energy
6.3.1. Needed for photosynthesis so that plants can make food
6.3.2. Needed for solar panels to generate electrical energy
6.4. Sound Energy
6.5. Electrical Energy
6.5.1. How Electrical Energy can be obtained
6.5.1.1. Using generators in power stations
6.5.1.2. Using batteries
6.5.1.3. Using solar panels
6.6. Heat energy
6.6.1. Make things warm
6.6.2. Generated through the burining of fuels
6.6.3. Frictional Force
7. Energy cannot be created or destroyed. It can only be converted from one form into another.
8. Commonly asked questions
8.1. Why does the ball move to a lower height with each bounce
8.1.1. Some of the kinetic energy of the ball had been converted to heat and sound energy(due to friction)
8.2. Why does the ball eventually stop bouncing?
8.2.1. All the kinetic energy had been converted to heat and sound energy(due to friction)
9. What are the main sources of energy?
9.1. Sun
9.1.1. Light and Heat energy.
9.1.1.1. Generating electricity(solar panels)
9.1.1.2. Photosynthesis
9.2. WInd
9.2.1. Kinetic energy
9.2.1.1. Generating electricity(wind turbines)
9.2.1.2. Milling(Windmills)
9.3. Running water
9.3.1. Kinetic energy
9.3.1.1. Generating electricity(generators)
9.3.1.2. Milling(water wheels)
9.4. Biomass fuels/Fossil fuels
9.4.1. Chemical potential energy
9.4.1.1. Generating electricity(steam turbines)
9.4.1.2. Burned to provide heat and light
9.4.1.3. An energy source of vehicles.