MICROORGANISMS : FRIEND AND FOE | Class 8 Science Notes

Microorganisms

Microorganisms, also known as microbes, are tiny living organisms that are too small to be seen with the naked eye. They can be unicellular or multicellular and include bacteria, fungi, protozoa, algae, and viruses. Microorganisms are found everywhere—in soil, water, air, and even inside the human body. Despite their small size, they play a crucial role in various natural processes and human life. They can be both beneficial and harmful. For example, some microorganisms help in digestion, while others cause diseases. They reproduce rapidly and can adapt to different environments. The study of microorganisms is essential for understanding health, disease, agriculture, and industry. This section introduces the basic concept of microorganisms, their types, and their significance.

📊 Diagram: Diagram showing various types of microorganisms such as bacteria (rod-shaped and spherical), fungi (mushroom and mold), protozoa (amoeba), algae (green filamentous), and viruses (illustrated as small particles).

🧪 Activity: Observation of microorganisms from pond water under a microscope to identify different types such as protozoa and algae.

🔗 Connection: This section lays the foundation for understanding the beneficial and harmful roles of microorganisms discussed in subsequent sections.