| 8. ENER

Apuntes

| 8. ENERGY STORES | Type of energy store | Example | | --- | --- | --- | | List 6 types of energy and give an example of each. | Gravitational potential | A raised object | | | Kinetic | A moving object | | | Elastic | A stretched object | | | Thermal | Hot objects | | | Chemical | Fuels | | Complete the sentence: Energy cannot be created or destroyed only transferred from one form to another. | | | # 9. ENERGY EFFICIENCY When energy is transferred, some is always lost as heat. Complete this calculation: Efficiency $(\%)$ = (Useful Energy Output + Total Energy Input) × 100 Which of these is most efficient and why? * A light bulb * A human body * A car engine Human body, even though we only use $25\%$ of fuel as useful energy! # 10. RENEWABLE VS NON-RENEWABLE ENERGY SOURCES | Compare both energy sources. Include the pros and cons of each, and examples from the UAE. | RENEWABLE | NON-RENEWABLE | | --- | --- | --- | | | Examples: Solar energy from Mohammed bin Rashid Al Maktoum Solar Park and nuclear power from Barakah Nuclear Energy Plant. Pros: Produce little or no greenhouse gases, so they are better for the environment and help reduce c...