Class 5 Conserving the Environment
Fill in the blanks:
- Our ………………. is made up of everything around us.
- …………… pollution is caused by the burning of fuel.
- The consumption of …………… water can lead to several diseases.
- Waste paper is …………. (biodegradable/ non-biodegradable).
- If you store water in a plastic bottle in the refrigerator, you are reusing ……it. (reusing/recycling)
- ……………. is produced by rotting leaves.
Answer the following question 2 or 3 sentences:
- [Q] What is recycling?
- [A] Converting waste into reusable materials.
- [Q] Name one biodegradable and one non-biodegradable substance.
- [A] Plant products, food waste, paper, etc., are biodegradable. Metals, plastics, electronic materials, etc., are non-biodegradable.
- [Q] What are the 3Rs?
- [A] Reducing, reusing, and recycling are the 3Rs. A fourth R has been added to the 3Rs in recent years-refuse. The idea is to refuse or say ‘no’ to items that damage the environment.
- [Q] Give four examples of environmental problems.
- [A] Water scarcity, soil infertility, pollution, and global warming are the four environmental problems.
- [Q] Provide five examples of natural resources.
- [A] Land, water, air, minerals, forests, and wildlife are all natural resources.
- [Q] What is composting? What are its benefits?
- [A] In composting, biodegradable waste is kept in a pit for 2-3 months until it rots and becomes manure. Manure is very beneficial for plants as it provides many nutrients.
- [Q] What type of fuel increases carbon dioxide levels in the air?
- [A] The burning of carbon-based fuels such as wood and petrol increases the amount of carbon dioxide in the air, causing global warming and climate change.
- [Q] What can be done to control air pollution?
- [A] Air pollution can be controlled by reducing fuel combustion, using filters in factory chimneys to filter out harmful substances, and reforestation.
- [Q] What can be done to control water pollution?
- [A] By treating sewage and factory wastes before disposing of them in water bodies, water pollution can be reduced.
Long Answer type questions:
[Q] Make a list of four measures that can be taken to combat air and water pollution.
[A] Use fuels with low sulphur and ash content, such as unleaded petrol, to combat air pollution. The use of public transportation, walking or cycling should be encouraged instead of private cars and other vehicles. Leaves and waste should not be burned openly.Planting more trees will reduce air pollution and absorb noise.
Water pollution can be reduced by following four steps: • Treat sewage before it enters main drainage channels. Fertilizer usage should be reduced in farming. Avoid washing, bathing, or using chemical soaps or detergents in rivers and ponds. Prevent construction in coastal and backwater areas.
[Q] Give five ways to control land pollution.
[A] Land pollution can be controlled in five ways:
Garbage should not be disposed of in the open. You should separate garbage bins for biodegradable and non-biodegradable items. A biodegradable substance is one that can be broken down by bacteria and absorbed by the soil, such as vegetable waste. Biodegradable substances, such as plastic, do not decompose naturally. Compost pits can be built to dispose of biodegradable garbage. As a result, soil fertility increases over time. To treat garbage, set up recycling plants. Set up landfills on the outskirts of the city.
[Q] What is the importance of forests and wildlife to us?
[A] Our planet’s green cover is increased by forests. They exhale oxygen, which is essential for our survival. Floods and soil erosion are prevented by them. Forests provide us with many forest goods, such as timber, medicinal plants, and fodder. Many wild animals live there as well.
Our wildlife must also be protected, just like our forests. There are several ways in which animals enrich our lives. Rural people are mostly involved in raising animals. We rely on animals for food, wool, hides, leather, and medicines. Some animals are used as means of transportation or as beasts of burden in remote areas.