Energy sources diagram comparing renewable and non-renewable resources.

Here's the completed worksheet with each item labeled as RENEWABLE or NON-RENEWABLE, followed by a clear explanation of the reasoning.

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✔ Completed Answers:

1. Wind — RENEWABLE
2. Trees — RENEWABLE
3. Fish — RENEWABLE
4. Coal — NON-RENEWABLE
5. Solar power — RENEWABLE
6. Wood (trees) — RENEWABLE
7. Hydroelectric power — RENEWABLE
8. Oxygen — RENEWABLE
9. Tidal power — RENEWABLE
10. Soil — RENEWABLE *(slowly, but naturally replenished)*
11. Geothermal — RENEWABLE
12. Oil — NON-RENEWABLE
13. Leather — RENEWABLE *(derived from animals, which can be raised sustainably)*
14. Natural gas — NON-RENEWABLE
15. Gold jewelry — NON-RENEWABLE *(gold is a finite mineral resource)*
16. Sand — RENEWABLE *(geologically replenished over time, though mining can outpace renewal)*
17. Nuclear energy — NON-RENEWABLE *(depends on uranium/plutonium, finite elements)*
18. Iron — NON-RENEWABLE
19. Water — RENEWABLE *(through the water cycle)*
20. Paper — RENEWABLE *(made from trees, which can be replanted and regrown)*
21. People — RENEWABLE *(human population reproduces and replaces itself — biological renewal)*
22. Copper — NON-RENEWABLE

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📌 Explanation of Key Concepts:

🔹 Renewable Resources:
These are resources that can be replenished naturally within a human timescale — either through natural cycles (like water, wind, sunlight) or sustainable management (like trees, fish, soil). Examples include:
- Wind, solar, hydro, tidal, geothermal → powered by ongoing natural processes.
- Trees, wood, paper, leather → come from living organisms that can be regrown or reproduced.
- Fish, people → biological populations that reproduce.
- Oxygen, water → part of Earth’s natural cycles (photosynthesis, hydrologic cycle).
- Soil, sand → regenerate slowly through geological/biological processes (though often slower than we consume them).

🔹 Non-Renewable Resources:
These are finite resources that take millions of years to form and cannot be replaced once used up. Examples include:
- Fossil fuels: coal, oil, natural gas → formed from ancient organic matter over eons.
- Minerals/metals: iron, copper, gold → mined from the Earth’s crust; not regenerated on human timescales.
- Nuclear fuel (uranium) → mined element; fission doesn’t “recreate” it.

⚠️ Important Notes:
- Some items like soil and sand are technically renewable, but their *rate of renewal* is very slow compared to how fast humans use them — so they’re often treated as “limited” in practice.
- Leather is renewable because it comes from animals (cattle, sheep, etc.) that can be raised sustainably — though ethical/environmental concerns exist.
- People are included here as a biological resource — humans reproduce and replace themselves, making them renewable in ecological terms (though this is more conceptual/philosophical).

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✔ Final Tip for Students:
When deciding if something is renewable, ask:
→ Can nature replace this within a few years or decades?
→ Is it being constantly replenished by natural cycles?
If yes → Renewable. If no → Non-renewable.

Good luck with your assignment! 🌱⚡🌍