Distinguish renewable from nonrenewable energy resources based on replenishment timescale, and evaluate why the distinction matters for long-term planning.
Natural resources fall into two broad categories based on how quickly they can be replenished. Renewable resources, like sunlight, wind, flowing water, and plant growth, biomass, are replenished naturally on a timescale that matches or beats how quickly humans use them; the sun keeps shining and the wind keeps blowing regardless of how much energy is captured from them today. Nonrenewable resources, like coal, oil, natural gas, and mined metals, formed over millions of years and exist in a fixed, limited supply that humans are using far faster than nature can replace it.
The distinction matters most for long-term planning: a resource that regenerates in days or years can be used indefinitely if managed well, while a resource that takes millions of years to form is, on any human timescale, a one-time supply. This does not automatically make renewable sources "better" for every single use, since each energy source still has its own reliability, cost, and location tradeoffs, but the renewable-versus-nonrenewable distinction is one of the most important factors in planning energy use decades into the future.
Mastery looks like: They can correctly classify a list of resources as renewable or nonrenewable and explain why the replenishment timescale matters for long-term planning.
Common stumbles: Assuming renewable resources have no limits at all, a solar panel still has a maximum output; treating "nonrenewable" as a value judgment rather than a factual timescale description.