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Microorganisms for sixth grade class

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Rachel Johnson

on 14 November 2012

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Transcript of Microorganisms for sixth grade class

Viruses a virus is not made up of cells. Viruses do not eat, they do not produce waste, nor do they do many of the functions that other living things do. In fact, the only thing they can do is reproduce.
It can't survive for long on its own, but only inside the cells of living creatures - bacteria, plants or animals.
Some common Viruses are: Chickenpox, Hepatitis A,B, and C, HIV, the Flu, Measles, Mumps, Rabies, Shingles, West Nile Virus, and Yellow Fever.


The four types of microorganisms are bacteria, fungi, protozoa, and viruses Bacteria are microscopic, single-celled organisms that exist all around you and inside you.
Fungi are organisms that are neither plant nor animal, yet have characteristics of both, and absorb food from whatever source they are growing on.
Protozoans are microscopic organisms that usually live in water.
Algae are a type of protist that usually live in water and can produce their own food.
Fungi and Bacteria are decomposers, bacteria and fungi feeding on and breaking down plant and animal matter.
Scientists can culture, grow microorganisms in a specially prepared nutrient medium.
What is it? A microorganism, a living thing that can only be seen with the aid of magnification, was probably the cause of whatever sickness you had. You may have called it a germ, but this term only describes relatively few microorganisms. Facts about Bacteria Some bacteria always live in our bodies. They are found in digestive systems and help digest food. Other bacteria are in our food. When you eat yogurt or cheese, you eat bacteria.
Bacteria are the smallest microorganisms. You can see them when there are thousands of them growing together in a colony. To see bacteria as a single organism, requires a microscope with very high magnification.

Facts about Fungi It looks like a plant but is not green. Mushrooms cannot make their own food and must live on a food source. Some are poisonous, and only an expert can identify them.
Some types of fungi rot wood in homes.
Fungi also like warm moist places to grow. A good way to prevent fungus is to keep things, like your toes, dry.
Facts about Protozoa They move through the water with tiny hair-like arms called cillia. The cillia are located all around the sack-like body of the protozoa and wave back and forth to move the protozoa through the water.
Some protists are producers like plants. Others must eat smaller things like bacteria or molds. Protozoa are an important food source for many pond creatures. Some protozoans are harmful to people.
Algae can be red, brown, yellow or green. Some of the largest algae are kelp. Algae are eaten by people, fish, and whales. In fact, algae are in ice cream.
They are everywhere! Microorganisms All microorganisms are living things or organisms. Microorganisms may be unicellular or single-celled, any living thing that has only one cell, the smallest unit of life. Some microorganisms are multicellular, having more than one cell. Microorganisms require food, air, water, ways to dispose of waste and an environment in which they can live. Some microorganisms are producers, living things that make their own food from simple substances usually using sunlight,
as plants do. Some microorganisms eat other organisms to get their food. Most microorganisms do not cause disease and many are helpful. There are many different kinds of microorganisms. Important Discoveries Louis Pasteur was a French chemist. He is sometimes known as the father of modern bacteriology because he was able to show that bacteria exist, grow and can be controlled. Pasteur is credited with developing the process of pasteurization. He developed an investigation, a process designed to answer a question, and used an experiment, a series of steps to find the answer to a question.

It was a warm September day in 1928. Alexander Fleming was working with bacterial cultures in a London hospital. He left the windows of the lab open. After studying some laboratory plates of staphylococci bacteria, he accidentally left a plate by the open window and forgot about it. A few days went by. He returned and found that the plate by the window was contaminated. Was his experiment ruined? Fleming didnʼt throw the plate away. He re-examined it under a microscope and found mold growing on the staphylococci. He noticed a clear zone that existed all around the mold. The mold was killing the deadly bacteria. Penicillin was the mold that killed bacteria.
It was Alexander Flemingʼs mistake that gave the world penicillin. This is now considered one of the greatest discoveries of the 20th century. Fleming received the Nobel Prize in 1945, and millions of people worldwide have survived disease because of his discovery. 1. 2.
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