Topics
Components of Food
- Food and Its Types
- What Do Different Food Items Contain?
- Test for Carbohydrates/Starch
- Test for Protein
- Test for Fats
- Nutrients and Nutrition
- Component of Food
- Carbohydrates
- Fats (Lipids)
- Proteins
- Vitamin and Minerals
- Component of Food: Minerals
- A Balanced Diet
- Obesity and Its Prevention
- Deficiency Diseases
- Diseases Due to Deficiency of Vitamin
- Diseases Due to Deficiency of Minerals
Food: Where Does It Come From?
- Food Variety
- Ingredients of Food
- Plant Sources
- Plant as Food (Plant Product)
- Animal Sources
- Animal Products used as Food
- Classification of Animal
- Food and Its Types
Science
Sorting Materials into Groups
Fibre to Fabric
- Fabrics
- Fibre
- Plant Fibres: Cotton
- Plant Fibre: Jute Fibre
- Fibre to Yarn to Fabric
- History of Clothing Material
Separation of Substances
- Mixture
- Types of Mixtures
- Separation of Mixtures
- Methods of Separation
- Handpicking Method
- Threshing Method
- Winnowing Method
- Sieving Method
- Sedimentation Method
- Decantation Method
- Filtration Method
- Evaporation Method
- Simple Distillation Method
- Introduction to Solutions
- Water - a Universal Solvent
- Composition of a Solution
- Types of Solutions
- Saturated Solutions
Getting to Know Plants
Body Movements
- Human Body and Its Movements
- Joints and Its Classification
- Human Skeleton System
- The Human Skeleton: Appendicular Skeleton
- The Human Skeleton: Axial Skeleton
- Bone and Its Types
- Muscles and Its Types
- Muscular System
- Movement in Different Animals
Changes Around Us
- Changes-Physical and Chemical
- Classification of Change: Reversible and Irreversible Changes
- Classification of Change: Desirable and Undesirable Changes
- Classification of Change: Natural and Man-made Changes
- Classification of Change: Periodic and Non-periodic Changes
- Classification of Change: Slow and Fast Changes
- Classification of Change: Physical Changes
- Chemical Reaction
- Effect of Heat on Solid, Liquid and Gases
The Living Organisms - Characteristics and Habitats
Motion and Measurement of Distances
- Story of Transport
- Measurements
- Unit and Its Types
- Unit Systems
- The International System of Units (SI)
- Devices for Measuring Length
- Measuring the Length of a Curved Line
- Force and Motion
- Types of Motion
- Multiple Motion
Light, Shadows and Reflections
Electricity and Circuits
- Electricity
- Electric cell
- A Bulb Connected to an Electric Cell
- Electric Circuit
- Switches
- Electrical Conduction in Solids
Fun with Magnets
- Magnet
- Uses of Magnets
- Discovery of Magnets
- Classification of Magnets
- Magnetic and Non-magnetic Materials
- Magnetic Pole
- Finding Directions with a Magnet
- Making a Magnet
- Magnetic Properties of Materials
- Demagnetization of a Magnet
Air Around Us
- Air Around Us
- Composition and Components of Air
- Importance of Air
- How is the Oxygen in the Atmosphere Replaced?
Water
Garbage In, Garbage Out
- Waste and Its Categories
- Disposal of Waste Water
- Vermicomposting
- Waste Separation Exercise
- Recycling of Paper
- Man-made Fibre: Plastics
- Harmful Effects of Plastics
- Recycling of Plastic
Notes
BIODEGRADABLE WASTE:-
A biodegradable material or substance can be defined as a material which can be decomposed easily by bacteria or any other natural organisms and not being the part of pollution.
Biodegradable wastes are the waste materials which are and can be easily degraded by natural factors like microbes (e.g. bacteria, fungi and few other), abiotic components like temperature, UV, oxygen, etc. few examples of such wastes are kitchen wastes, food materials, and other natural wastes. Microorganisms and other abiotic elements worktogether break down complex substances into simple organic matters which finally suspend and disappear into the soil. The whole process is natural which can be fast or slow. So, the environmental issues and risks caused by biodegradable wastes are very low.
Examples of biodegradable.
But the giant dumping of waste can increase some threats to life sooner or later. To prevent this, some people practice known as composting. In composting, the biodegradable wastes are dumped into a big pit and covered for a time period. During this the action of microbes, they will decompose and will be used as compost for cultivation purpose. This will reduce the quantity of waste at landfills.
NON-BIODEGRADABLE WASTE:-
Waste which cannot be decomposed or degrade by the biological process is known as “Non-biodegradable wastes”. Most of them include inorganic waste is non-biodegradable.
What does Non-biodegradable mean?
A Non-Biodegradable material can be defined as a type of material which cannot be broken down by natural organisms and serve as a source of pollution.
Unlike biodegradable wastes, non-biodegradable wastes cannot be easily taken care of. Non-biodegradable wastes are those which cannot be decomposed or degraded by natural agents. They remain on earth for thousands of years without any degradation or decomposition. Therefore, the threat caused by them is also more dangerous. An example is the plastic which is usually used in almost every area. To give these plastics a long-lasting outcome, better quality plastics are being used. This made them more temperature resilient and tougher even after the use. Other cases are cans, metals, and chemicals for agricultural and industrial uses. They are the chief causes of air, water and soil pollution and diseases like cancer.
Since non-biodegradable wastes are not at all Eco-friendly, they need to be replaced or substituted. As a part of the growth of alternatives, scientists have brought forward many innovative ideas like biodegradable plastics, etc. They combined some biodegradable materials with plastics and made them easily and speedily degradable. But this is quite a costly procedure. Non-biodegradable wastes which can be recycled and can be used again are known as “Recyclable waste” and those which cannot be used again are known as “Non-recyclable waste”
Shaalaa.com | Our Environment part 11 (Solid waste disposal: Biodegradable)
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