Summary
Energy comes from various sources, some of which are renewable and others non-renewable. The Sun is our main source of energy, providing both light and heat.
- Non-renewable energy resources — energy sources that can run out. Example: Natural gas, coal, crude oil
- Renewable energy resources — energy sources that do not run out easily. Example: Wind, running water, solar energy
- Solar energy — energy from the Sun used for electricity and heating. Example: Solar panels convert light energy to electrical energy
- Wind energy — energy from wind used in windmills and turbines. Example: Wind turbines convert kinetic energy of wind to electrical energy
- Hydroelectric energy — energy from running water used in power stations. Example: Dams convert gravitational potential energy of water to electrical energy
- Fuels — sources of chemical potential energy that release heat and light when burned. Example: Fuels like coal and oil are used in power stations to generate electricity
Exam Tips
Key Definitions to Remember
- Non-renewable energy resources
- Renewable energy resources
- Solar energy
- Wind energy
- Hydroelectric energy
- Fuels
Common Confusions
- Confusing renewable with non-renewable resources
- Misunderstanding the role of the Sun in energy production
Typical Exam Questions
- What is the main source of energy for Earth? The Sun
- Which energy resources are renewable? Wind, running water, solar energy
- How do solar panels work? They convert light energy to electrical energy
What Examiners Usually Test
- Understanding the difference between renewable and non-renewable energy
- The role of the Sun in providing energy
- How different energy sources are used and converted