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Our Environment (Part 1) Class 5 Notes Science

Introduction

  • The natural surroundings in which living things grow, develop and survive to make up the environment. 
  • The word ‘environ’ means to surround.
  • The environment includes biotic things (plants and animals) and abiotic things (soil, water, and air). 
  • It provides us with everything and supports our survival. 
  • Every living thing depends on other living and non-living things in its environment.
  • If our surroundings are clean, then our environment is healthy. 
  • A clean environment is essential for a healthy living. 
  • Any damage to the environment will directly or indirectly affect us and other living beings, such as plants and animals.  

Waste

Generally, we discard many items that seems useless to us. Such useless and unwanted material that is discarded by humans is known as waste. Wastes are produced in our homes, schools, offices, markets, industries and agricultural fields. 

Types of waste

1. Biodegradable Waste

  • The waste that easily rots is called biodegradable waste. 
  • It consists of organic waste which gets broken down into simpler particles (called degradation) by the action of decomposers. 
  • Example: Vegetable peels, paper bits, dry leaves, tissues, egg shells, fruit peels, hairs, etc

 2.  Non-biodegradable Waste

  • The waste that does not rot is called non-biodegradable waste. 
  • It consists of inorganic waste that cannot be broken down into simpler particles by the action of decomposers. 
  • Examples: Plastic and glass bottles, old cells, batteries, polythene bags, etc.

Need to Manage Waste

Proper management of waste, especially non-biodegradable waste, is very important. The generation of waste not only looks aesthetically unpleasant, but it is also harmful to our environment.

Management of Non-biodegradable Wastes

  • Proper storage: To generate less waste, we should always store food items properly so that microorganisms cannot spoil them.
  • Reduce: Reduce the production of wastes by consumption and low wastage. For example, avoid using plastic bags; carry your own cloth bags, use both sides of the paper, buy only what you need and avoid using disposable plastic items.
  • Reuse: This explains the importance of utilizing things that we no longer require for different purposes. We can use empty jam containers to keep pickles, spices, etc. Also, we should choose to buy things like bottles for soft drinks and juices, rather than metal cans.
  • Recycle: This involves the production of new products from the old discarded products. Paper, glass, plastics and metals can be recycled repeatedly without any loss of quality.

Management of Biodegradable Waste

  • Composting: Vegetable and fruit peels, egg shells, paper, jute products, hair, etc., are converted into compost in deep pits called compost pits. It is done by the action of decomposers like bacteria and fungi. 
  • Vermicomposting: Vermicomposting involves the use of red earthworms instead of fungi and bacteria. Earthworms are added to the waste and they breakdown the organic matter into soil like material, called vermicompost.
  •  Biogas: The biogas is produced in a biogas plant. Cow and buffalo dung along with agricultural remains get decomposed and produce biogas. The main constituent of this gas is methane. Methane gas acts as an excellent fuel.
The document Our Environment (Part 1) Class 5 Notes Science is a part of the Class 5 Course Science Class 5.
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FAQs on Our Environment (Part 1) Class 5 Notes Science

1. What is waste management?
Ans. Waste management refers to the collection, transportation, processing, and disposal of waste materials. It involves the proper handling and disposal of waste to minimize its impact on the environment and public health.
2. Why is waste management important?
Ans. Waste management is important for several reasons. Firstly, it helps to protect the environment by reducing pollution and conserving natural resources. Secondly, it helps to maintain public health by preventing the spread of diseases and reducing exposure to hazardous materials. Additionally, proper waste management can also create economic opportunities through recycling and waste-to-energy initiatives.
3. What are the different methods of waste management?
Ans. There are several methods of waste management. These include recycling, composting, landfilling, incineration, and waste-to-energy conversion. Recycling involves the collection and processing of waste materials to produce new products. Composting involves the biological decomposition of organic waste to produce nutrient-rich compost. Landfilling involves burying waste in specially designed landfills. Incineration involves the combustion of waste at high temperatures, while waste-to-energy conversion involves generating electricity or heat from waste.
4. How can individuals contribute to waste management?
Ans. Individuals can contribute to waste management by practicing the 3Rs: Reduce, Reuse, and Recycle. They can reduce waste by avoiding the purchase of unnecessary items and opting for durable and reusable products. Reusing items instead of throwing them away can also help minimize waste. Recycling is another important way to contribute to waste management. Sorting and separating recyclable materials and disposing of them in designated recycling bins ensures that they can be processed and used to create new products.
5. What are some challenges in waste management?
Ans. Waste management faces several challenges. One of the major challenges is the increasing amount of waste generated due to population growth and urbanization. Another challenge is the improper disposal of waste, which can lead to pollution of land, water, and air. Lack of awareness and infrastructure for waste management in certain areas is also a challenge. Additionally, the presence of hazardous waste requires special handling and disposal methods to ensure the safety of the environment and human health.
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