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Our Environment - 1 Class 6 Worksheet Science

Q1: Multiple Choice Questions (MCQs).

(i) An ecosystem is made up of:
(a) Living organisms only
(b) Non-living things only
(c) Both living organisms and non-living things
(d) None of the above

Ans: (c)
An ecosystem is a community of living organisms (plants, animals, and microbes) interacting with one another and their non-living environment (air, water, and soil).
Our Environment - 1 Class 6 Worksheet Science

(ii) Which of the following is a biotic component of the environment?
(a) Soil
(b) Water
(c) Air
(d) Plants

Ans: (d)
Biotic components are the living organisms in an ecosystem. Plants are living organisms and are therefore a biotic component of the environment.

(iii) Which of the following is an abiotic component of the environment?
(a) Animals
(b) Sunlight
(c) Bacteria
(d) Fungi

Ans: (b)
Abiotic components are the non-living factors of an ecosystem. Sunlight is a non-living factor and is therefore an abiotic component of the environment.

(iv) The process by which green plants make their food is called:
(a) Respiration
(b) Photosynthesis
(c) Transpiration
(d) Decomposition

Ans: (b)
Photosynthesis is the process by which green plants convert sunlight, carbon dioxide, and water into glucose (food) and oxygen.
Our Environment - 1 Class 6 Worksheet Science

(v) Which of the following is not a natural resource?
(a) Water
(b) Soil
(c) Plastic
(d) Air

Ans: (c)
Natural resources are materials or substances that occur in nature and can be used for economic gain. Water, soil, and air are all natural resources, while plastic is a man-made material.

Q2: Fill in the blanks.

(i) The _____ is made up of living and non-living things.
(ii) _____ are natural resources that can be used again and again.
(iii) The _____ is the layer of the atmosphere closest to the Earth's surface.
(iv) The process of converting waste materials into new products is called _____.
(v) Plants release _____ into the atmosphere during the process of photosynthesis.
Ans: 
(i) environment
(ii) Renewable resources
(iii) troposphere
(iv) recycling
Our Environment - 1 Class 6 Worksheet Science(v) oxygen

Q3: True or False.

(i) The environment consists only of living things.
(ii) Renewable resources can never be used up completely.
(iii) The ozone layer is found in the stratosphere.Our Environment - 1 Class 6 Worksheet Science(iv) Burning fossil fuels does not contribute to air pollution.
(v) Cutting down trees helps in maintaining the balance of the ecosystem.
Ans: 
(i) False: The environment consists of both living (biotic) and non-living (abiotic) components.
(ii) True: Renewable resources can be replenished naturally and can be used again and again.
(iii) True: The ozone layer is found in the stratosphere, which is the second layer of the Earth's atmosphere.
(iv) False: Burning fossil fuels contributes to air pollution by releasing harmful gases and particulates into the atmosphere.
(v) False: Cutting down trees disrupts the balance of the ecosystem, as trees provide oxygen, absorb carbon dioxide, and provide a habitat for various species.

Q4: Match the column.

Our Environment - 1 Class 6 Worksheet ScienceAns:
Our Environment - 1 Class 6 Worksheet Science

Q5: Short Answer Questions.

(i) What is an ecosystem?
Ans: An ecosystem is a community of living organisms (plants, animals, and microbes) interacting with one another and their non-living environment (air, water, and soil).

(ii) Give an example of a biotic component and an abiotic component of the environment.
Ans: An example of a biotic component is a tree, and an example of an abiotic component is sunlight.

(iii) What is the role of decomposers in the environment?
Ans: Decomposers play a crucial role in the environment by breaking down dead plants and animals into simpler substances. This helps in recycling nutrients and maintaining soil fertility.
Our Environment - 1 Class 6 Worksheet Science

(iv) Why is it important to conserve natural resources?
Ans: It is essential to conserve natural resources because they provide us with the materials and energy needed for our survival and well-being. Moreover, conserving natural resources helps maintain a balance in the ecosystem and ensures the availability of resources for future generations.

(v) What is the difference between renewable and non-renewable resources?
Ans: Renewable resources are those resources that can be replenished naturally on a human timescale, such as sunlight, wind, and water. Non-renewable resources are those that cannot be replenished within a human timescale or are formed at a much slower rate than their consumption, such as fossil fuels (coal, oil, and natural gas) and minerals.

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FAQs on Our Environment - 1 Class 6 Worksheet Science

1. What are the major causes of environmental pollution?
Ans. The major causes of environmental pollution include industrial activities, vehicle emissions, improper waste disposal, deforestation, and the use of non-renewable energy sources.
2. How does deforestation impact the environment?
Ans. Deforestation leads to the loss of forests and vegetation, which in turn results in the loss of habitat for numerous species. It also contributes to climate change as trees absorb carbon dioxide, a greenhouse gas. Additionally, deforestation can lead to soil erosion, decreased rainfall, and disruption of local ecosystems.
3. What are the consequences of water pollution?
Ans. Water pollution can have numerous consequences, including the contamination of drinking water sources, the death of aquatic life, and the spread of waterborne diseases. It can also impact recreational activities such as swimming and fishing, as polluted water can pose health risks to humans.
4. How does air pollution affect human health?
Ans. Air pollution can have severe effects on human health, including respiratory issues such as asthma, bronchitis, and lung cancer. It can also exacerbate existing conditions such as allergies and cardiovascular diseases. Prolonged exposure to air pollution can lead to long-term health problems and reduce overall life expectancy.
5. What are some sustainable practices that can help protect the environment?
Ans. Some sustainable practices that can help protect the environment include reducing waste by recycling and reusing materials, conserving energy by using energy-efficient appliances and practices, promoting renewable energy sources, practicing responsible water usage, and supporting conservation efforts such as reforestation and wildlife protection.
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