Test: Protecting Our Environment - Class 3 MCQ

Excessive use of fertilizers and pesticides can degrade soil quality and harm beneficial organisms in the soil. This practice can lead to land pollution, making it less fertile and decreasing its agricultural productivity.

Cutting down too many trees leads to soil erosion as tree roots help anchor the soil in place. Without trees, the soil is more vulnerable to being washed away by rain, leading to loss of fertile land.

Plants play a crucial role in maintaining air quality by absorbing carbon dioxide, a greenhouse gas, and releasing oxygen, which is essential for the survival of animals and humans. This process, known as photosynthesis, is vital for life on Earth and helps to balance atmospheric gases.

The Van Mahotsav festival is dedicated to planting trees and raising awareness about the importance of trees for maintaining a healthy environment. It promotes community involvement in environmental conservation.

Using noise barriers can effectively reduce noise pollution by blocking sound waves from reaching residential areas, thereby creating a quieter and more peaceful environment.

Planting trees is an effective way to combat land pollution. Trees help improve soil health, prevent erosion, and increase biodiversity, while also absorbing carbon dioxide and producing oxygen. Reducing waste and using biodegradable materials also contribute to cleaner land.

Water pollution is detrimental to aquatic ecosystems. Contaminated water bodies can lead to the death of fish and other aquatic organisms, disrupt food chains, and pose serious health risks to humans who consume contaminated water or fish.

Factory waste is a significant source of water pollution as it often contains harmful chemicals that can contaminate rivers, lakes, and oceans, posing health risks to both aquatic life and humans.

Separating dry and wet waste is a practical step individuals can take to minimize land pollution. This practice facilitates recycling and proper waste management, reducing the amount of waste that ends up in landfills.

Pollutants are harmful materials that contaminate the environment, making it dirty and unhealthy. They can come from various sources, including industrial waste, plastic, and agricultural runoff, and pose risks to both ecological and human health.

The Chipko Movement was primarily focused on preventing deforestation by encouraging people to hug trees to protect them from being cut down. This grassroots movement raised awareness about the importance of forests in sustaining the environment.

While air, water, and noise pollution are mentioned, light pollution is not included in the discussed types. Light pollution refers to excessive or misdirected artificial light that can disrupt ecosystems and human activities.

Planting more trees is highly encouraged as it helps maintain clean air, supports biodiversity, and contributes to soil fertility. This practice is essential for creating a healthier environment.

Deforestation decreases oxygen levels because trees, which produce oxygen through photosynthesis, are removed. This leads to poorer air quality and contributes to increased carbon dioxide levels in the atmosphere.

"Reduce" is one of the three R's (Reduce, Reuse, Recycle) aimed at minimizing waste and conserving resources. By reducing consumption, individuals can help lessen the environmental impact and promote sustainability.

Using public transport reduces the number of vehicles on the road, which helps decrease air pollution and traffic congestion. It is an effective way to lower the overall environmental impact of transportation.

Noise pollution, characterized by loud and disturbing sounds, can lead to hearing loss and other health issues such as stress and sleep disturbances. Prolonged exposure to high noise levels can significantly affect well-being.

Using water filters helps conserve water resources by ensuring that water remains clean and safe for consumption. In contrast, bathing animals and washing clothes in natural water bodies contribute to pollution, which harms aquatic ecosystems.

Air pollution is linked to various respiratory diseases, including asthma and chronic bronchitis, as harmful pollutants irritate the airways and lungs, leading to serious health issues.

Burning garbage contributes to air pollution by releasing harmful smoke and gases into the atmosphere, which can lead to respiratory problems and other health issues. In contrast, planting trees and using public transport help mitigate pollution.