Tag Archives: Microscope

What are germs?

Men once believed that evil spirits made people sick.  Today we know that infectious diseases are caused by tiny organisms commonly called germs. Three common kinds of germs are bacteria, viruses, and protozoa Bacteria germs are one-celled plants that can be seen only through a microscope.  They cause many diseases, including pneumonia, scarlet fever and …

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How does a microscope work?

The word “microscope” comes from the Greek words for “small” and “see”.  A microscope is a device that tests you see very tiny things you can’t see with your eyes alone. The simplest kind is an ordinary magnifying glass.  A magnifying glass bends the light and spreads if to make things look bigger than they …

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How does yeast make bread rise?

YEASTS ARE THE TINY PLANTS THAT, WHN MIXED IN MOIST BREAD DOUGH, RELEASE A GAS THAT PUFFS UP THE DOUGH AND MAKE THE BREAD SOFT AND LIGHT. Bread is the oldest of all manmade foods. The earliest bread was not like the bread you are probably used to.  It was hard, flat, and dry. The …

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Where does mold come from?

Mold is really a patch of tiny plants.  Tiny molds “seeds” called spores are carried away by currents of air.  When they land on a material they can use as food, the spores grow into new mold plants. If you leave a piece of damp bread in the kitchen, in a few days it will …

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What is Pollen?

The tiny yellow grains that are found in flowers are pollen.  The flowers use it in making the seeds that will grow into new plants. The dusty yellow grains that are found in flowers are pollen. Plants make the pollen in the saclike anthers of their flowers.  Pollen grains are so small that they look …

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