Pollution and Conservation of Environment - 1 Class 5 Worksheet SST

Q1: Multiple Choice Questions (MCQs).

(i) Human activities play a significant role in causing which type of pollution?
(a) Natural pollution
(b) Beneficial pollution
(c) Human pollution
(d) Environmental pollution
Ans: (c)
Human activities are the primary cause of pollution in various forms, such as air, water, soil, noise, and light pollution.

(ii) Which of the following activities can contribute to water pollution?
(a) Planting trees near water bodies
(b) Releasing industrial waste
(c) Recycling plastic bottles
(d) Using energy-efficient light bulbs
Ans: (b)
Releasing industrial waste into water bodies can contaminate the water and harm aquatic life, contributing to water pollution.

(iii) How does noise pollution affect human health?
(a) It improves concentration
(b) It causes increased sleep
(c) It leads to hearing loss and stress
(d) It enhances communication skills
Ans: (c)
Prolonged exposure to noise pollution can result in hearing loss, stress, irritation, and sleep disturbances.

(iv) Which form of pollution disrupts astronomical observations and affects nocturnal animals?
(a) Soil pollution
(b) Water pollution
(c) Light pollution
(d) Air pollution
Ans: (c)
Light pollution from excessive artificial lighting can disrupt astronomical observations and impact nocturnal animals' behavior.

(v) What is the main consequence of land pollution?
(a) Increased plant growth
(b) Improved soil fertility
(c) Harm to living organisms and reduced plant growth
(d) Enhanced water quality
Ans: (c)
Land pollution negatively affects soil fertility, harming organisms in the soil and impeding the growth of plants.

Q2: True or False.

(i) Pollution refers to the contamination of the environment by harmful substances.
(ii) Air pollution only affects outdoor environments.
(iii) Conserving water means using it wastefully.
(iv) Recycling is an effective way to reduce waste and conserve resources.
(v) Deforestation has a positive impact on the environment.
(vi) Non-renewable energy sources, like coal and oil, are better for the environment than renewable energy sources.
(vii) Noise pollution does not have any adverse effects on human health.
(viii) Conservation is only important for protecting wildlife.
(ix) The ozone layer is beneficial for protecting us from harmful ultraviolet (UV) radiation.
(x) Overfishing can disrupt the balance of marine ecosystems.
Ans:
(i) True
(ii) False
(iii) False
(iv) True
(v) False
(vi) False
(vii) False
(viii) False
(ix) True
(x) True

Q3: Match the following.

Match the terms on the left with their corresponding definitions on the right. Write the corresponding letter in the space provided.

Ans: 

Q4: Fill in the Blanks.

(i) Pollution can be caused by both natural and ____________ factors.
(ii) One way to conserve energy is by using ____________ light bulbs.
(iii) The three R's of waste management are Reduce, ____________, and Recycle.
(iv) Deforestation contributes to climate change by reducing the number of trees that can ____________ carbon dioxide.
(v)  ____________ pollution occurs when chemicals from fertilizers and pesticides enter water bodies.

Ans:
(i) anthropogenic
(ii) energy-efficient
(iii) Reuse
(iv) absorb/store
(v) Water

Q5: Short Answer Question.

(i) What are some examples of air pollution and their effects?
Ans: Examples of air pollution include vehicle emissions, industrial smoke, and burning fossil fuels. The effects of air pollution can range from respiratory problems in humans, such as asthma and lung diseases, to environmental damage, such as smog formation and depletion of the ozone layer.

(ii) Explain the concept of reducing, reusing, and recycling waste.
Ans: Reducing, reusing, and recycling waste is a concept known as the three R's of waste management. Reducing waste involves minimizing the amount of waste generated by using fewer resources and making conscious choices, such as opting for products with less packaging. Reusing involves finding new uses for items instead of throwing them away. Recycling involves collecting and processing waste materials to create new products, conserving resources and reducing the need for raw materials extraction.

(iii) How does deforestation impact the environment?
Ans: Deforestation refers to the clearing or removal of forests or trees from a land area. It impacts the environment in several ways. Trees play a crucial role in absorbing carbon dioxide and releasing oxygen, so deforestation contributes to increased greenhouse gas emissions and climate change. It also leads to habitat loss for many plant and animal species, disrupts ecosystems, increases soil erosion, and reduces biodiversity.

(iv) Why is it important to conserve water?
Ans: Conserving water is important because water is a finite resource essential for all life forms. By conserving water, we ensure its availability for future generations and reduce the strain on freshwater sources. Additionally, water conservation helps to reduce energy consumption associated with water treatment and distribution.

(v) Discuss the role of individuals in reducing pollution and conserving the environment.
Ans: Individuals play a vital role in reducing pollution and conserving the environment. They can adopt eco-friendly habits such as reducing energy consumption, using public transportation or carpooling, properly disposing of waste, practicing recycling, conserving water, planting trees, and supporting environmental initiatives. By making conscious choices and being aware of their impact on the environment, individuals contribute to a healthier and more sustainable future.