Class 5 Exam  >  Class 5 Notes  >  Science Class 5  >  Worksheet: Our Environment - 2

Our Environment - 2 Class 3 Worksheet Science

Q1: Multiple Choice Questions.

(i) Which of the following is a natural greenhouse gas?
(a) 
Oxygen
(b) 
Carbon dioxide
(c) 
Nitrogen
(d) 
Hydrogen
Our Environment - 2 Class 3 Worksheet Science

(ii) What is the primary source of energy for the water cycle?
(a) 
Wind
(b) 
Sun
(c) 
Earth's core
(d) 
Moon

(iii) Which activity contributes to air pollution?
(a) 
Planting trees
(b) 
Using public transportation
(c) 
Burning fossil fuels
(d)
Recycling paper

(iv) What is the main purpose of the ozone layer in the atmosphere?
(a) 
To produce oxygen for breathing
(b) 
To prevent the greenhouse effect
(c) 
To absorb harmful UV rays
(d) 
To regulate the Earth's rotation

(v) Which environmental problem is caused by the excessive use of synthetic fertilizers and pesticides?
(a) 
Global warming
(b) 
Soil erosion
(c) 
Acid rain
(d) 
Deforestation
Our Environment - 2 Class 3 Worksheet Science

Q2: Fill in the Blanks.

(i) The process by which green plants make their food is called __________.

(ii) __________ is the thin layer of gases that surround the Earth.

(iii) The process of water turning into vapor is called __________.
Our Environment - 2 Class 3 Worksheet Science

(iv) The three main types of pollution are air pollution, water pollution, and __________.

(v) __________ is the excessive cutting down of trees.

Q3: Match the Column.

Match the items in Column A with their corresponding descriptions in Column B.
Our Environment - 2 Class 3 Worksheet Science

Q4: True or False. 

(i) The ozone layer helps in protecting the Earth from harmful ultraviolet (UV) rays of the sun.

(ii) Overpopulation has no impact on the environment.

(iii) All types of plastic are biodegradable.

(iv) Recycling helps reduce the amount of waste in landfills.

(v) Cutting down trees has no effect on the water cycle.

Q5: Short Answer Questions.

(i) What is biodiversity, and why is it important for the environment?
Our Environment - 2 Class 3 Worksheet Science

(ii) Describe the greenhouse effect and its impact on global temperatures.

(iii) What are the three Rs in waste management, and how do they help reduce environmental impact?

(iv) Explain the concept of the food chain with an example.
Our Environment - 2 Class 3 Worksheet Science

(v) How can individuals contribute to conserving the environment in their daily lives?

The document Our Environment - 2 Class 3 Worksheet Science is a part of the Class 5 Course Science Class 5.
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FAQs on Our Environment - 2 Class 3 Worksheet Science

1. What are some ways to reduce air pollution?
Ans. Some ways to reduce air pollution include reducing the use of vehicles, promoting the use of public transportation, reducing industrial emissions, and using renewable sources of energy.
2. How does deforestation impact our environment?
Ans. Deforestation has a significant impact on our environment as it leads to loss of biodiversity, contributes to climate change, and reduces the availability of oxygen. It also disrupts the water cycle and can lead to soil erosion.
3. What are the effects of water pollution on marine life?
Ans. Water pollution has detrimental effects on marine life as it can lead to the death of aquatic animals, disrupt the food chain, and cause the loss of habitats. It can also result in the accumulation of toxins in marine organisms, which can then be harmful to humans who consume them.
4. How can individuals help conserve water?
Ans. Individuals can help conserve water by practicing simple measures such as turning off the tap while brushing teeth, fixing leaking faucets, using water-efficient appliances, and collecting rainwater for gardening purposes. Additionally, taking shorter showers and using a bucket instead of a hose for car washing can also contribute to water conservation.
5. What are the consequences of plastic pollution?
Ans. Plastic pollution has severe consequences as it can harm marine life, contaminate water sources, and contribute to the degradation of ecosystems. Plastic waste can take hundreds of years to decompose, leading to long-lasting environmental damage. Additionally, the ingestion of microplastics by animals can also have detrimental effects on their health.
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