Nature’s Treasures · Lesson 7 of 8
Resources We Use and Their Renewal
“Classify nature’s gifts and human-made objects, then apply renewal time to daily choices.”
• Distinguish natural resources from human-made resources and connect them. • Classify the chapter’s examples as renewable or non-renewable using a time-scale test. • Identify direct and indirect natural-resource use in daily activities. • Propose responsible choices that consider both present and future needs.
A resource can come from nature or be made by people
Air to breathe, water to drink and heat and light from the Sun come from nature. Food from plants and animals, forest products, soil, rocks, minerals and fossil fuels are also natural resources. Humans use natural materials and their skills to make objects such as furniture, bicycles, electric bulbs and solar panels. The finished object is human-made, even when the materials or energy needed to make it came from nature.
A useful resource provided by nature, such as air, water, sunlight, forest, soil, rock, mineral or fossil fuel.
A useful thing created by people, often using natural resources, such as a bicycle, bulb or solar panel.
Problem
Is a wooden chair a forest resource or a human-made resource?
- 1.The wood comes from trees and is a natural material.
- 2.People shape and assemble the wood into a chair.
- 3.Classify the chair as human-made while explaining its dependence on a forest resource.
The time needed for renewal matters
Some resources are renewed by natural processes within a reasonable time. Air, water and forests are examples of renewable natural resources in this chapter. A forest can grow again from seeds, perhaps helped by birds and other animals, but this takes years. The word renewable never means that careless use is harmless or that clean, accessible supplies are guaranteed everywhere.
A natural resource renewed, replenished or restored by natural processes within a reasonable period of time.
Other resources exist in limited quantities or take far too long to replace on the time scale of our lives. The chapter groups minerals, soil, rocks, coal, petroleum and natural gas as non-renewable. Soil formation can take thousands of years, and fossil fuels millions. The key question is not whether something ever forms in nature, but whether it is restored within a reasonable time compared with its use.
A natural resource that is limited and not replenished within a reasonable period of time.
| Resource | Chapter classification | Reason or care needed |
|---|---|---|
| Air and water | Renewable | Natural processes renew them; prevent pollution and waste |
| Forest | Renewable | Can regrow, but needs years and careful use |
| Soil and rocks | Non-renewable | Formation takes thousands of years or longer |
| Minerals | Non-renewable | Limited and not quickly replaced |
| Coal, petroleum, natural gas | Non-renewable | Formation takes millions of years |
Problem
A student says both are renewable because nature can produce them. What time-scale distinction is missing?
- 1.A forest can regenerate in years through new growth, although recovery still needs care.
- 2.Soil formation through rock breakdown takes thousands of years.
- 3.On the chapter’s reasonable-time test, forest is renewable and soil is non-renewable.
Both a rock and a forest are natural. The renewable distinction concerns the time and process of replenishment; the natural versus human-made distinction concerns origin.
Follow resources through a day
At school or home, trace the resources used directly and indirectly. Washing clothes uses water directly. A clay toy uses material from soil; firewood comes from trees; a kite uses materials that ultimately come from natural resources; breakfast draws on plants, animals, water, soil and sunlight. Clothes also depend on plant or animal fibres or other raw materials. Your list may vary by the object: investigate its materials instead of assuming every kite or garment is identical.
| Activity | Natural-resource connection to investigate |
|---|---|
| Washing clothes | Water |
| Making clay toys | Clay from soil |
| Collecting firewood | Trees from forests |
| Making kites | Natural raw materials used for the actual paper, frame or string |
| Having breakfast | Food from plants or animals, with water, soil and Sun supporting production |
| Wearing clothes | Raw materials such as plant or animal fibres, depending on fabric |
Problem
How can eating a bowl of food involve more than one natural resource?
- 1.Identify the plant or animal that supplied the food.
- 2.A growing plant needed resources including water, soil and sunlight; an animal may have eaten plants.
- 3.The food is the direct resource, while the others contributed indirectly to producing it.
Choose with the future in mind
Returning from Ajji’s village, the children notice fewer trees and smoke from vehicles in the city. Electric vehicles do not release smoke at the vehicle, and cleaner travel options can improve local air. Yet electricity still has to be produced, so thoughtful resource choices look at the wider pathway. Saving water, preventing pollution, caring for trees and using fuels sparingly meet present needs while leaving resources and a healthier environment for the future.
Quiz
Which is a natural resource?
Why is a solar panel classified as human-made?
What makes a resource renewable in this chapter?
How is soil classified here?
Which pair contains only non-renewable resources?
Why can breakfast involve sunlight indirectly?
Which statement about an electric vehicle is careful?
Practice Problems
- Classify air, water, Sun, forest, soil, rock, mineral and fossil fuel as natural resources; name four human-made objects that depend on them.
- Sort air, water, forest, soil, minerals, rocks, coal, petroleum and natural gas by renewal time and explain two difficult choices.
- Trace the direct and indirect natural resources involved in washing clothes, making a clay toy, collecting firewood, making a kite and eating breakfast.
- Why does a forest still need protection even though the chapter calls it renewable?
- Compare the local air effects of a petrol vehicle and an electric vehicle, then explain why electricity’s source also matters.
- Design a feasible change at home or school that reduces one type of resource waste and explain how to check whether it worked.
- Discuss how to meet present needs without damaging the ability of future people and living beings to meet theirs.
Key Takeaways
• Natural resources come from nature; human-made objects are created by people using resources. • Air, water and forests are renewable in the chapter, but they still need care. • Soil, rocks, minerals and fossil fuels are non-renewable on a reasonable human time scale. • Daily activities use natural resources directly and indirectly, so responsible choices protect future needs.