Some energy resources are reliably available at all times, whereas others are intermittent and not available at all times.
Which row shows three energy resources correctly classified?
Available at all timesNot available at all timesAnuclear powerwind energy, geothermalBwind energy, geothermalnuclear powerCgeothermal, nuclear powerwind energyDwind energynuclear power, geothermal \begin{array}{|c|c|c|} \hline & \text{Available at all times} & \text{Not available at all times} \\ \hline \text{A} & \text{nuclear power} & \text{wind energy, geothermal} \\ \hline \text{B} & \text{wind energy, geothermal} & \text{nuclear power} \\ \hline \text{C} & \text{geothermal, nuclear power} & \text{wind energy} \\ \hline \text{D} & \text{wind energy} & \text{nuclear power, geothermal} \\ \hline \end{array} ABCDAvailable at all timesnuclear powerwind energy, geothermalgeothermal, nuclear powerwind energyNot available at all timeswind energy, geothermalnuclear powerwind energynuclear power, geothermalRow A
Row B
Row C
Row D
533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.