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Key Point: Time remaining (years) = Total amount of resource ÷ Annual consumption. Example: 1000 liters ÷ 50 liters/year = 20 years.
What does "What if it finishes?" mean? It asks us to imagine what would happen if important natural resources — like water, forests, coal or soil — run out. These resources are used every day for drinking, growing food, making electricity, building houses and many other things. If they finished, life would become very hard for people, animals and plants.
Types of resources
Why do resources finish? They finish because of overuse, waste, pollution and cutting down forests faster than we plant new ones. Population growth and modern life that uses more energy and materials also increase demand.
What would happen if they finished?
How can we stop this? By using the three R's: Reduce what we use, Reuse items instead of throwing them away, and Recycle materials (paper, plastic, metal). Other actions include planting trees, saving water (turning off taps, fixing leaks), using public transport or bicycles, using energy-efficient bulbs, and learning to waste less food.
Role of children: Simple habits like switching off lights, carrying a water bottle, turning taps off while brushing teeth, and using paper carefully help a lot. Small actions at home and school add up.
Summary: If we take care of resources now, they will last longer. If we waste them, we risk shortages that make life difficult. Conservation and smart use are the best answers to "What if it finishes?"
Key Point: Percentage of resource used = (part / total) × 100
What are natural resources? Natural resources are materials and energy that we get from the Earth and its environment. They help us live, grow food, build houses, make clothes, travel and make electricity.
Types of natural resources
Uses of natural resources
How resources can finish and why conservation is important
Simple activities to understand the topic
Key Point: If (replenishment rate) ≥ (consumption rate) → Resource behaves as renewable
What are resources? Resources are things we get from nature and use to live — like water, air, wood, coal and sunlight. These help us cook, travel, make houses and grow food.
Renewable resources are those that can be replaced naturally in a short time. Examples are sunlight, wind, water (rain), plants and animals. They keep coming back if we use them wisely. For example, trees can grow again if we plant new ones; rain refills rivers.
Non‑renewable resources are those that cannot be replaced quickly — they form over millions of years. Examples include coal, petroleum (oil), natural gas and many minerals. Once we use them up, they cannot be made again in our lifetime.
Main differences (simple):
Why this matters (from the chapter "What if it Finishes?"): If non‑renewable resources finish, we will not have fuel for cooking, heating, vehicles or factories. So we must save resources, use renewable energy, plant trees and follow the 3 R's — Reduce, Reuse, Recycle.
How to save resources (simple actions): Use water carefully, switch off lights, use solar panels where possible, plant trees, walk or cycle short distances, recycle paper, plastic and metals.
Key Point: Litres used = flow_rate (L/min) × time (minutes). Example: shower of 8 L/min for 6 min → 8 × 6 = 48 L.
What is water scarcity? Water scarcity means there is not enough clean water for people, animals and plants to use every day. Even though Earth looks full of water, most of it is salty or frozen in glaciers. Only a very small amount is fresh and easy to use.
Why is water important? Water is needed for drinking, cooking, bathing, growing food, cleaning and keeping nature healthy. Without enough water life becomes difficult or impossible.
Causes of water scarcity
How can we conserve (save) water? Small everyday actions help a lot. These are easy steps children and families can follow:
School and community actions — Teach classmates about saving water, measure school water use, plant trees to keep soil moist and run community rainwater-harvesting projects.
Simple idea of numbers: Earth’s water looks large, but about 97% is saltwater. Of the small fresh water, much is frozen in glaciers. So the usable fresh water for people is less than 1% of all water on Earth. That is why every drop matters.
Conclusion: Water scarcity is a serious problem but each person can help by using water carefully, fixing leaks, collecting rainwater and reusing water where safe. Small daily habits add up to big savings for the future.
Key Point: Area of land (for simple plots) = length × width (e.g., a 10 m × 5 m garden has area 50 m²).
Why soil and land are important
Soil is the top layer of the earth where plants grow. It stores water and nutrients, helps plants grow food, and is home to many tiny animals and microbes. Land is the surface we use for farming, houses, parks and forests. If soil is lost or ruined, plants cannot grow well and water becomes polluted.
What causes soil loss and land damage?
How to preserve soil and land
What children and families can do
Long-term benefits
Preserving soil keeps land fertile for growing food, reduces floods and dust storms, protects wildlife, and keeps water clean. Small actions at home and in the community add up to big protection for soil and land.
Key Point: Forest cover percentage = (Forest area / Total land area) × 100
Forests are large areas covered with trees, plants and many kinds of animals. Wildlife means all the animals, birds, insects and plants that live in nature. Forests and wildlife are very important for people, animals and the Earth.
Why forests and wildlife are important
Main threats to forests and wildlife
How loss of forests and wildlife affects us
What we can do to help
Key Point: Consumption rate = Amount used ÷ Time (for example: 100 litres of petrol ÷ 10 days = 10 L/day)
What are fossil fuels and minerals?
Fossil fuels are energy sources formed from the remains of plants and animals that lived millions of years ago. The main fossil fuels are coal, petroleum (oil), and natural gas. Minerals are naturally occurring materials found in the Earth’s crust such as iron ore, bauxite (aluminium ore), copper, and limestone. Minerals are usually solid and are used to make things.
Uses
Limits and problems
Why we must save them
How to use them wisely (simple conservation ideas)
Short summary
Fossil fuels and minerals help make electricity, run vehicles, and build nearly everything we use. They are very useful but limited and can harm the environment. Using them carefully and finding clean alternatives helps protect the planet.
Key Point: Energy (E) = Power (P) × Time (t). Example units: watts × hours. If P is in watts and t in hours, E is in watt‑hours (Wh).
What is energy? Energy is the ability to do work — to run machines, cook food, light a bulb and move vehicles. We get energy from many sources. Some sources can finish (non-renewable) and some can be renewed (renewable).
Why save energy? Many traditional energy sources like coal, oil and natural gas are limited. Using too much causes pollution and will make these fuels finish. Saving energy helps us keep resources for the future, saves money and reduces pollution.
Types of energy sources
How renewable sources work (simple): Solar panels convert sunlight into electricity. Wind turbines use wind to turn blades and make electricity. Hydroelectric dams use flowing water to turn turbines. Biogas plants convert kitchen and farm waste into gas that can be used for cooking.
How we can save energy — easy actions at home and school
Why choose alternative sources? They do not run out quickly and create less pollution. For example, rooftop solar can give electricity for lights and fans; biogas can replace LPG for cooking in villages; wind farms supply electricity to towns.
Simple everyday examples: Replacing an old 100 W bulb with a 10–12 W LED gives the same light but uses much less electricity. Using a solar lamp for evening study reduces electricity bills. A small school roof with solar panels can power lights and fans.
Takeaway: Save energy by changing habits and using efficient devices. Support and use renewable (alternative) sources so energy does not finish and the environment stays cleaner for everyone.
Key Point: Recycling rate (%) = (Amount recycled ÷ Total waste generated) × 100
What is waste management? Waste management means handling the waste we create so it causes less harm to people and the environment. It includes making less waste, using things again, and turning some waste into new things.
Three main ideas: Reduce, Reuse, Recycle
How to practice at home and school
Why it is important
Simple steps to remember
Teaching tip: Show children how much waste a family makes in a week, sort it and plan how to reduce each kind. Small daily actions make a big difference.
Key Point: Water used = flow rate × time (for example: litres/min × minutes = litres).
What the topic means
Conservation practices are simple actions we do to save natural resources (like water, energy, soil and trees). Sustainable living means using resources in a way that they do not finish and future generations can use them too. Both help keep nature healthy and our lives comfortable.
Why it is important
Resources such as fresh water, clean air, fertile soil and fuels are limited. If we waste them, they may run out or become dirty. Conservation slows down this loss and makes sure there is enough for everyone, now and later.
Everyday practical practices (easy to follow)
How small actions help
Small daily actions by many people add up. For example, if every family saves 10 litres of water a day, a whole neighbourhood saves thousands of litres each week. This keeps more water available for drinking, farming and animals.
Role of community and rules
Schools, families and local governments can help by teaching conservation, setting up recycling systems, fixing leaks in public places, and creating parks. Laws and community programmes make it easier for everyone to practise sustainable living.
Long-term benefits
Conservation reduces bills (less water and electricity used), protects wildlife, keeps soil fertile for farming, and helps fight pollution and climate change. Living sustainably means better health, more savings and a safer planet for children growing up now.
Key Point: Percentage saved = ((Original amount − New amount) / Original amount) × 100. Example: if you used 100 L and now use 80 L, percentage saved = ((100 − 80)/100)×100 = 20%.
What the topic means
This topic explains how each person, children and the government can help save natural resources (like water, trees, fuel and clean air) and stop them from finishing. When everyone does small things together, big problems can be solved.
Role of individuals (adults and families)
Role of children
Role of government
Working together
When individuals, children and the government act together, the results are strong. For example, if the government builds rainwater-harvesting tanks and families use them, less groundwater is taken and water remains for longer. If schools teach children about saving electricity, children will remind their families to switch off lights, reducing energy use.
Simple steps everyone can follow
In short: People make everyday choices, children learn and spread good habits, and the government builds and enforces systems. All three roles are needed to keep our resources from finishing.
Key Point: Volume of a rectangular water tank = length × width × height (all in metres). Volume in cubic metres × 1000 = litres.
This chapter teaches children why natural resources like water, soil, trees, fuel and electricity are limited and how small actions can prevent them from finishing. Classroom activities and simple experiments help students observe resource use, understand conservation, and practice sustainable habits.
Useful activities include surveys, role plays, hands-on experiments and project work. Experiments should ask a question, list materials, describe steps, record observations and state conclusions. Each activity must link to a real-life idea of saving resources.
Key learning points to highlight in the classroom:
Safety note: Always use safe, non-toxic materials and adult supervision for experiments involving heat, sharp items or chemicals.