Energy Resources and Efficiency

Vocabulary flashcards covering energy efficiency formulas, reduction of energy waste, non-renewable and renewable classifications, and comparisons of various renewable energy resources.

Efficiency (Energy calculation)

Calculated using the formula $\text{Efficiency} = \frac{\text{useful energy output}}{\text{total energy input}}$.

Efficiency (Power calculation)

Calculated using the formula $\text{Efficiency} = \frac{\text{useful power output}}{\text{total power input}}$.

Wasted energy reduction methods

Methods to reduce wasted energy during transfer, specifically lubrication and thermal insulation.

Non-renewable energy

Energy sources that will run out (are finite), can damage the environment, but provide more energy.

Renewable energy

Energy sources that will never run out and can be replenished, but do not provide as much energy.

Solar energy

Energy harnessed from sunlight; renewable, reliable in sunny countries, and non-polluting, but requires significant energy to construct, operates only during daylight, and cannot respond to immediate demand.

Geothermal energy

Energy obtained from hot rocks underground; renewable, reliable through a free source, and has minimal environmental impact, though it may release greenhouse gases and functions only in specific geographic locations.

Wind power

Energy harnessed using turbines; renewable, non-polluting, and has low running costs with no fuel costs, but is less reliable and cannot increase supply to meet demand.

Hydroelectric power

Energy harnessed using dams; renewable, creates no pollution, and can readily adjust output to match demand, but incurs high construction costs and causes major environmental impact.

Wave power

Energy produced by wave-powered turbines; renewable and produces no pollution, but disturbs natural habitats and creates hazards for boats.

Tidal barrages

Big dams built across rivers to generate energy; renewable, non-polluting, and very reliable, but disrupt boat access and can harm vegetation in estuaries.

Biofuels

Energy resource that is renewable, reliable, and carbon neutral, but has high costs and can lead to the clearance of natural spaces and deforestation.