The majority of the world’s electrical energy comes from nonrenewable sources, such as the burning of coal, oil, and gas, or from nuclear power stations. As the link between global warming and amount of carbon dioxide in the atmosphere becomes clearer, the need to find additional, renewable sources becomes more urgent. The following activities will introduce students to types of energy resources, and help them decide when and where each type is appropriate to use!
Essential Questions for Energy Resources
- What is the best way to produce electricity?
- Why do we need to change how we generate electricity?
- How is generating electricity linked to global warming?
Background Information on Energy Sources
The first town in the world to have a public electricity supply was Godalming, England. In 1881, a company installed a generator connected to a waterwheel. They laid cables in the gutters and connected them to streetlights. Since this time, the global consumption of electricity has rapidly grown.
Fossil fuels are created from the remains of living things and they take millions of years to form. The world's reserves of fossil fuels are running low, as they are being used at a much faster rate than they are being created. Although burning fossil fuels is a cheap and reliable source of generating an electric current, the carbon dioxide it produces is having a negative effect on the environment. For more information about the effects of greenhouse gases on the environment check out the lesson plans on the greenhouse effect and global warming.
Energy Resources
Fossil Fuels
Nonrenewable Resource
Fossil fuel power stations burn fossil fuels to heat water. This water then turns into high-pressured steam. The steam runs over a turbine, making the turbine spin. The spinning turbine is connected to a generator and the generator produces an electric current. Examples of fossil fuels include coal, oil and gas.
- Fossil fuels are cheap to mine and to convert into electrical energy.
- Burning fossil fuels has been reliable.
- Fossil fuels can be burned safely.
- Fossil fuels greatly contribute to global warming, as burning fossil fuels releases carbon dioxide into the atmosphere.
- Coal also contains impurities such as sulfur that, when burned, can form sulfur dioxide. Sulfur dioxide in the atmosphere can lead to acid rain.
- Supplies of fossil fuels will run out one day.
Nuclear Power
Nonrenewable Resource
Energy is released from the nuclei of atoms using a nuclear reaction. This reaction is known as fission and involves splitting large nuclei, such as in a uranium atom, into smaller nuclei, releasing vast amounts of energy. This energy is used to heat water and turn it into steam. This steam then drives a turbine, which turns a generator and produces an electric current.
- Power stations are generally safe.
- Nothing is burned, so no greenhouse gases or atmospheric pollution are emitted.
- A small amount of fuel can produce a large amount of electrical energy.
- The waste from nuclear power stations remains radioactive and harmful to living things for thousands of years, so it needs to be disposed of carefully.
- Nuclear power stations are safe, but if something goes wrong like a major natural disaster or a terrorist attack, they have the potential to be very dangerous.
- Nuclear power stations have very high setup costs
Wind Energy
Renewable Resource
Harnessing wind energy involves putting turbines in places where there is a lot of wind. The movement of air causes the blades to spin, which in turn can drive a generator to produce an electric current. Wind turbines can be used individually or together in groups as wind farms. As well as using them on land, they can also be used offshore.
- Turbines do not burn anything and do not emit any other atmospheric pollution.
- There are no fuel costs because the "fuel" is moving air around a turbine.
- Wind turbines are not expensive to run once set up.
- Some people argue that the turbines can ruin an area’s natural beauty.
- Setup costs can be high, particularly for multiple turbines.
- The effectiveness depends on the amount of wind, so they are not always reliable.
- Turbines can be noisy.
Solar Energy
Renewable Resource
Solar energy works using photo-voltaic cells to harness light energy from the sun and convert it into electrical energy.
- Solar energy has no atmospheric pollution because nothing is burned.
- Solar panels can be used in remote locations or even made to be portable.
- There are no fuel costs associated with solar energy.
- Solar power systems can be expensive to set up
- Solar power is not always reliable because the effectiveness depends on how much sunlight an area receives.
Tidal Energy
Renewable Resource
Tides are the movement of water caused by the gravitational pull of the moon. Barrages (dam or barrier) are built across the mouth of rivers, estuaries, and in bays. These barrages contain turbines which spin when the water moves. These turbines drive generators which can produce an electric current.
- Tidal energy does not involve burning fuel, so there are no fuel costs or greenhouse gases.
- Tides are predictable; high and low tides occur in well understood cycles.
- Barrages have long life spans.
- Tidal energy has very expensive setup costs.
- Building barrages can harm marine habitats.
- Barrages can block access to certain rivers or other waterways.
Wave Energy
Renewable Resource
Waves are caused by wind and result in water moving up and down. This kinetic energy can be harnessed and transferred into electrical energy. There are many different ways of doing this.
- Wave energy is renewable and will never run out.
- There are no harmful emissions associated with wave energy.
- Wave energy is not suitable for all locations. Most inland areas cannot use wave energy.
- Wave energy stations can have a negative effect on marine life.
- Wave energy stations can destroy the natural beauty of coastal areas.
Geothermal Energy
Renewable Resource
Geothermal power uses thermal energy found underneath the ground. Cold water is pumped down underground and is converted into steam. This steam is then passed through tubes to a turbine which spins as the steam passes over it. The spinning turbine drives a generator and produces an electric current.
- Geothermal energy is reliable.
- There are no greenhouse gases emitted from the station because nothing is burned.
- There are no fuel costs because geothermal energy uses the natural heat of the earth.
- Could potentially release underground greenhouse gases.
- There are high setup costs associated with geothermal energy.
- Geothermal energy can only be used where there is volcanic activity.
Biomass Energy
Renewable Resource
Biomass is material that comes from living things, like plants and animals. Biomass, such as wood, can be burned and used to heat water into steam. The steam is used to make a turbine spin. This turbine is connected to a generator which generates electricity.
- Biomass energy is renewable: as we burn the biomass we grow more plants to replenish the stock.
- Biomass energy is reliable.
- The carbon dioxide released by burning the biomass is absorbed by regrowing plants.
- Land used for livestock or growing food may have to be used instead for growing energy crops.
- Biomass energy requires large amounts of water.
Hydroelectricity
Renewable Resource
With hydroelectricity, water is kept behind a dam in a high place. This water has gravitational potential energy and is converted into kinetic energy as the water falls. This moving water makes a turbine spin. The turbine is connected to a generator which produces an electric current.
- With hydroelectricity, there is no burning or atmospheric pollution.
- Water is a renewable resource.
- Dams are very expensive to build.
- Large areas of land need to be flooded for the reservoirs.
- Dams can stop migrating fish.
Additional Energy Resources Activity Ideas
- Make a poster PSA explaining why renewable energy resources are better than nonrenewable energy resources.
- Use a T-Chart to compare two different energy resources.
- Have students make a timeline describing the main stages of the development of energy engineering.
How Tos about Renewable Energy & Energy Resources
Create a hands-on classroom experiment to demonstrate renewable energy in action
Design a fun experiment using simple materials to help students see how renewable energy works. For example, build a mini solar oven with a pizza box and foil, or create a wind-powered car using a balloon and paper. Hands-on projects boost engagement and deepen understanding!
Gather materials and set up safely
Collect items like cardboard boxes, aluminum foil, tape, balloons, paper, and small wheels. Check for safety by ensuring all materials are age-appropriate and workspace is clear. Setting up in advance keeps your lesson running smoothly!
Guide students through building their experiment
Share step-by-step instructions, providing support as students assemble their projects. Encourage teamwork and creative problem-solving. Let students personalize their creations to spark excitement!
Test and observe energy conversion
Have students place their experiments in sunlight or use wind (like blowing through a straw) to activate them. Ask students to record what happens and discuss why energy conversion occurs. Observation builds scientific thinking!
Reflect and connect to real-world energy solutions
Lead a discussion on how these mini-experiments relate to larger renewable energy sources, like solar panels or wind farms. Help students make connections to energy choices in their community. Reflection turns learning into action!
Frequently Asked Questions about Renewable Energy & Energy Resources
What are the main types of energy resources used to produce electricity?
The main types of energy resources for electricity are nonrenewable sources like fossil fuels and nuclear power, and renewable sources such as wind, solar, tidal, wave, geothermal, biomass, and hydroelectricity.
Why is it important to switch from nonrenewable to renewable energy sources?
Switching to renewable energy helps reduce carbon dioxide emissions and global warming, conserves resources, and creates a more sustainable future for electricity generation.
How does generating electricity contribute to global warming?
When we generate electricity by burning fossil fuels, it releases carbon dioxide and other greenhouse gases into the atmosphere, which trap heat and contribute to global warming.
What are the advantages and disadvantages of solar energy in schools?
Advantages of solar energy include no atmospheric pollution and suitability for remote locations. Disadvantages are high setup costs and unreliable output in areas with limited sunlight.
How can I teach students about the differences between renewable and nonrenewable energy?
Use activities like posters, T-Charts for comparison, and timelines to help students understand that renewable energy comes from sources that are naturally replenished, while nonrenewable energy relies on finite resources.
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