Environmental Pollution
Chapter-2
Grade-5
Q.A. Fill in the blanks.
a) ______________________ is one of the main causes of pollution.b) Effects of pollution on animals are the destruction of their ___________ and food chains.
c) Many _______________ continues to melt and results in sea _______________.
d) Air pollution is the addition of harmful gases, dust particles, smoke or ____________ into the air.
e) Smoke emitted from burning ____________.
2. Short Q/A
Q.1. What is the environmental pollution?
Ans: Our environment changes in many ways. When the changes are harmful to the living things, it is called environmental pollution.Q.2. What are the effects of air pollution?
Ans: The effects of air pollution are—
i) Global warming
ii) Acid rain
iii) Respiratory diseases like lung cancer, bronchitis etc.
Q. 3. Write down the ways of environmental pollution?
Ans: The ways of environmental pollution are-i) Use of pesticides and fertilisers in agriculture
ii) Harmful gases into the air.
Ans: Soil pollution is the contamination of soil with harmful things. Effects of soil pollution are decreased soil fertility, death of plants and animals. People may get sick with various disease including cancer by taking those foods grown in polluted soil.
5) Why does population growth cause environmental pollution?
Ans: People use different elements of the environment to meet up the demands of the increased population. It results in the change of different elements and pollutes the environment. For example, people are cutting down trees to have cultivable lands so that they can grow more crops. As a result, environment is getting polluted. Besides, to meet up the demand of food for the increased population, excessive amount of fertilizers and pesticides are being used. These chemicals mixing with the rain water contaminate the surface water.
Q.4. What are the sources of environmental pollution?
Ans: The main sources of environmental pollution are the burning of fossil fuels, industrialization, population growth, toxic chemical and household waste.Q.5. Write the five ways of environmental conservation.
Ans: The five ways of environmental conservation are- Wise use Dumping garbage in the dustbin Planting trees Raising public awareness Reusing of natural resources.
3. Descriptive Answer questions.
1) Explain the harmful effects of environmental pollution.
Ans: The harmful effects of environmental pollution are- Destruction of their habitats Animals get extinct Sea level rise Global warming People sick with lung cancer, respiratory diseases.2) What is noise pollution? What is the harmful impact of noise pollution.
Ans: Noise pollution is sound in the environment that harms the health of human or animal life. Noise pollution has severe mental and physical effect on human health. Depression, hearing loss, sleep disruption and loss of productivity are caused by noise pollution.3) What is environmental conservation? How can we conserve our environment?
Ans: Environmental conservation is the sustainable and wise use and protection of natural environment. We can conserve our environment in the following ways- Walking or riding a bicycle Dumping garbage in the dustbin Planting trees Raising public awareness Reusing of natural resources.
4) Explain the negative impacts of soil pollution on human health.
Ans: Soil pollution is the contamination of soil with harmful things. Effects of soil pollution are decreased soil fertility, death of plants and animals. People may get sick with various disease including cancer by taking those foods grown in polluted soil. 5) Why does population growth cause environmental pollution?
Ans: People use different elements of the environment to meet up the demands of the increased population. It results in the change of different elements and pollutes the environment. For example, people are cutting down trees to have cultivable lands so that they can grow more crops. As a result, environment is getting polluted. Besides, to meet up the demand of food for the increased population, excessive amount of fertilizers and pesticides are being used. These chemicals mixing with the rain water contaminate the surface water.
