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What is a microorganism? | Year 6 Science PDF Download

Understanding Microorganisms

  • Introduction to Microorganisms: Microorganisms are incredibly small living organisms that can only be seen under a microscope. They play vital roles in various processes around us.
  • Role of Yeast in Bread Making: Yeast, a type of microorganism, is essential in making bread rise. It ferments sugars in the dough, producing carbon dioxide gas which causes the bread to expand and become fluffy.
  • Function of Bacteria in Nutrient Recycling: Bacteria are another type of microorganism that break down organic matter like dead plants into nutrients. This decomposition process is crucial for recycling nutrients back into the ecosystem.
  • Microorganisms and Hygiene: Microorganisms, often referred to as 'germs', can be harmful and cause illnesses. Practicing good hygiene, such as washing hands with soap and hot water after handling food or using the restroom, is essential to prevent the spread of harmful germs.

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Which microorganism is essential in making bread rise by fermenting sugars in the dough?
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FAQs on What is a microorganism? - Year 6 Science

1. What are microorganisms?
Ans. Microorganisms are tiny living organisms that are too small to be seen with the naked eye. They include bacteria, viruses, fungi, and protozoa.
2. How do microorganisms differ from each other?
Ans. Microorganisms differ from each other in terms of their structure, function, and how they reproduce. For example, bacteria are single-celled organisms with a simple structure, while fungi are multicellular organisms with complex structures.
3. What are some common examples of microorganisms?
Ans. Some common examples of microorganisms include E. coli bacteria, influenza viruses, yeast fungi, and amoeba protozoa.
4. How do microorganisms impact human health?
Ans. Microorganisms can have both positive and negative impacts on human health. Some microorganisms, like probiotic bacteria, can help improve digestion. However, others, like disease-causing bacteria and viruses, can lead to illnesses such as colds, flu, and food poisoning.
5. How can we prevent the spread of harmful microorganisms?
Ans. To prevent the spread of harmful microorganisms, it is important to practice good hygiene, such as washing hands regularly, covering coughs and sneezes, and avoiding close contact with sick individuals. Additionally, using disinfectants and practicing proper food safety measures can help reduce the risk of spreading harmful microorganisms.
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