Inaugurated by IN-SPACe
ISRO Registered Space Tutor
S4-SA4-0079
What are Biodegradable Wastes?
Grade Level:
Class 7
Space Technology, EVs, Climate Change, Biotechnology, HealthTech, Robotics, Chemistry, Physics
Definition
What is it?
Biodegradable wastes are materials that can be broken down naturally by living organisms like bacteria and fungi into simpler, harmless substances. This process helps these wastes mix back into the environment without causing pollution.
Simple Example
Quick Example
Imagine you eat an apple and throw the core in your garden. After some days, if you check, you won't find the apple core because it has decomposed and become part of the soil. This is because the apple core is biodegradable.
Worked Example
Step-by-Step
Let's track a banana peel's journey as biodegradable waste:
1. A banana peel is discarded after eating.
---
2. It falls onto the soil or is placed in a compost pit.
---
3. Tiny organisms like bacteria and fungi, present in the soil, start feeding on the banana peel.
---
4. They break down the complex organic matter of the peel into simpler compounds like water, carbon dioxide, and nutrients.
---
5. Over a few weeks, the banana peel completely disappears, enriching the soil with nutrients. This is how biodegradable waste returns to nature.
Why It Matters
Understanding biodegradable waste is crucial for managing our environment and preventing pollution. Scientists in Biotechnology develop ways to speed up waste decomposition, while experts in Climate Change use this knowledge to create sustainable waste management systems. This also helps in creating healthier cities, impacting HealthTech by reducing disease vectors.
Common Mistakes
MISTAKE: Thinking all natural things are biodegradable. For example, plastic is made from petroleum (natural resource) but is not biodegradable. | CORRECTION: Biodegradability depends on whether living organisms can break it down, not just its origin.
MISTAKE: Believing biodegradable waste disappears instantly. | CORRECTION: Decomposition takes time, ranging from days to months, depending on the material and environmental conditions like moisture and temperature.
MISTAKE: Confusing biodegradable with compostable. | CORRECTION: While all compostable items are biodegradable, 'compostable' specifically means it breaks down into nutrient-rich compost under specific conditions, often in a compost pit.
Practice Questions
Try It Yourself
QUESTION: Is a newspaper biodegradable? | ANSWER: Yes, a newspaper is made from wood pulp, which is biodegradable.
QUESTION: Your mom asks you to separate waste. Where would you put leftover roti and vegetable peels – in the general waste bin or a separate bin for decomposition? | ANSWER: You should put leftover roti and vegetable peels in a separate bin for decomposition (or composting) because they are biodegradable.
QUESTION: A plastic water bottle and a cotton cloth are both left exposed to the elements. Which one will break down faster and why? | ANSWER: The cotton cloth will break down faster because it is made of natural fibers (cellulose) that can be decomposed by microorganisms, whereas the plastic bottle is non-biodegradable.
MCQ
Quick Quiz
Which of the following is an example of biodegradable waste?
Plastic bottle
Glass jar
Vegetable peels
Aluminium foil
The Correct Answer Is:
C
Vegetable peels are organic matter that can be broken down by microorganisms into simpler substances. Plastic bottles, glass jars, and aluminium foil are non-biodegradable and do not decompose naturally.
Real World Connection
In the Real World
In many Indian homes, especially in villages and smaller towns, kitchen waste like vegetable and fruit peels, and food scraps are collected separately. This waste is often used to make compost for gardens or fields, enriching the soil for growing new crops. This practice is a direct application of understanding biodegradable waste.
Key Vocabulary
Key Terms
DECOMPOSITION: The process by which organic substances are broken down into simpler matter | MICROORGANISMS: Tiny living things like bacteria and fungi that help in decomposition | ORGANIC MATTER: Material that comes from living organisms (plants, animals) | COMPOSTING: A process of recycling organic matter into fertilizer
What's Next
What to Learn Next
Now that you understand biodegradable waste, you should learn about 'Non-Biodegradable Wastes'. This will help you compare and contrast the two types of waste and better understand why waste segregation is so important for our planet.
