Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Nature operates on a zero-waste principle where the waste of one organism serves as a resource for another, maintaining a delicate balance.
Biodegradable Waste: Substances that can be broken down into simpler, harmless substances by the action of microorganisms like bacteria and fungi. Examples include fruit peels, paper, and animal dung which contain organic compounds like .
Non-biodegradable Waste: Materials that cannot be decomposed by biological processes, such as plastics, glass, and metal scraps. These persist in the environment for many years, often exceeding years.
Decomposers: Organisms such as fungi and bacteria that break down dead organic matter into inorganic nutrients like , , and minerals, returning them to the soil and atmosphere.
Composting: The process of converting organic waste into nutrient-rich manure. Vermicomposting involves the use of Redworms to accelerate this decomposition.
Nutrient Cycling: The continuous movement of essential elements like Carbon (), Nitrogen (), and Oxygen () through the biotic and abiotic components of the ecosystem.
The 5 R's Principle: To maintain harmony, humans must follow Refuse, Reduce, Reuse, Repurpose, and Recycle to manage the waste that nature cannot process.
📐Formulae
💡Examples
Problem 1:
A school garden produces of organic waste. After composting for three months, the resulting manure weighs . Calculate the total mass lost during the decomposition process using vertical subtraction.
Solution:
Explanation:
The total mass of organic matter converted into gases like and water vapor during decomposition is .
Problem 2:
Identify the chemical process represented by and explain its role in nature's harmony.
Solution:
This is the process of Photosynthesis.
Explanation:
In nature's harmony, plants take in the 'waste' produced by animal respiration and decomposition and convert it into glucose () and , which are essential for the survival of aerobic organisms.