🔴 Exam Challenge Cards

Explain why wind energy is considered renewable.

Wind is created by the Sun heating the Earth's surface. Because the Sun continuously provides energy, wind is naturally replenished.

Explain why fossil fuels are considered non-renewable.

They take millions of years to form, while humans consume them much faster than they can naturally be replaced.

Why does the fact that a resource is renewable not necessarily mean we can use it without limits?

Some renewable resources can become depleted if humans consume or damage them faster than natural processes can replace them.

A town uses water faster than the water cycle can replenish its supply. Is water still technically renewable? Explain.

Yes, water is renewable because it is replenished through the water cycle. However, the local supply can become depleted if it is used faster than it is replenished.