Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
The environment consists of biotic (living) and abiotic (non-living) components such as , air, and soil.
Pollution is the addition of harmful substances (pollutants) to the environment, making it unfit for use.
Air pollution is caused by the release of harmful gases like and from factories and vehicles.
Water pollution occurs when untreated sewage or industrial waste is dumped into water bodies, contaminating the .
Soil pollution is caused by the excessive use of chemical fertilizers and the dumping of non-biodegradable waste like plastic.
Noise pollution is caused by loud sounds from machines, loudspeakers, and vehicles, which can lead to hearing loss.
Global warming is the gradual increase in the Earth's temperature due to the greenhouse effect, primarily caused by excess .
Conservation is the wise use and protection of natural resources using the 3 Rs: Reduce, Reuse, and Recycle.
📐Formulae
💡Examples
Problem 1:
During the process of photosynthesis, what gas do plants absorb from the atmosphere, and what do they release?
Solution:
Plants absorb Carbon Dioxide () and release Oxygen ().
Explanation:
Plants act as natural air purifiers by reducing the levels of and increasing in the environment.
Problem 2:
Why is it important to prevent the contamination of sources?
Solution:
Contaminated contains germs and toxic chemicals that cause diseases like cholera and typhoid.
Explanation:
Clean water () is essential for the survival of all living beings, and pollutants make it hazardous for consumption.
Problem 3:
How does the 'Reduce' principle help in conservation?
Solution:
By using fewer resources, such as turning off lights to save energy or using less plastic.
Explanation:
Reducing consumption leads to less waste generation and less pressure on natural resources like coal and petroleum.