Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Natural resources are materials provided by Earth that humans use to survive, such as air, water, soil, minerals, and forests.
Renewable resources are those that can be replenished naturally over time, like solar energy, wind energy, and .
Non-renewable resources are available in limited quantities and take millions of years to form, such as coal, petroleum, and natural gas.
Pollution is the addition of harmful substances to the environment. Major types include Air, Water, and Soil pollution.
Plants play a vital role in maintaining the balance of gases by absorbing and releasing during photosynthesis.
The 3 R's of environment protection are Reduce (using less), Reuse (using things again), and Recycle (processing waste into new products).
Soil erosion is the removal of the top layer of soil by wind or water. Planting trees (afforestation) helps prevent this.
Conservation of water involves preventing wastage and keeping our bodies free from industrial chemicals and sewage.
📐Formulae
💡Examples
Problem 1:
If a factory releases large amounts of and smoke into the atmosphere, what kind of pollution is it causing and how can we mitigate it?
Solution:
It is causing Air Pollution.
Explanation:
The smoke contains harmful gases like Carbon Dioxide () and Carbon Monoxide (). Mitigation can be done by installing filters in factory chimneys and planting more trees to absorb the excess .
Problem 2:
Classify the following into Renewable and Non-renewable resources: Solar Energy, Coal, Petroleum, Wind.
Solution:
Renewable: Solar Energy, Wind; Non-renewable: Coal, Petroleum.
Explanation:
Solar and Wind are infinite and replenish quickly. Coal and Petroleum take millions of years to form and are depleted once used.
Problem 3:
How does recycling a plastic bottle help the environment?
Solution:
It reduces the demand for new plastic and prevents land/water pollution.
Explanation:
By following the principle, we ensure that plastic does not end up in landfills or oceans, where it would otherwise take hundreds of years to decompose.