Although viruses and bacteria can both make us sick they are very different. Pathogens or germs are names we use to refer to both bad viruses and bacteria.
Bacteria are living cells that come in three shapes; rods, spirals, and spheres. The cells have DNA, but lack a nucleus. They can reproduce rapidly when in the right environment. Most are harmless, some are good and a few are dangerous to humans. Good bacteria such as yeast give texture to our bread products and break down food in our digestive systems. Macrophage cells in our immune systems work to destroy bad bacteria, and antibiotics can help when bacteria become too numerous.
Viruses are much smaller than bacteria and reproduce by taking over a host cell. They cannot live without a host and are destroyed by the T-cells found in our immune systems. H and N surface proteins protrude from viruses and are the way scientists differentiate between them.
We read The Way We Work by David Macaulay to get a better understanding of the differences between viruses and bacteria and then took a few notes.
Bacteria come in three shapes, so each child chose a shape of bacteria to create and I created a virus. The kids were able to choose from any of the crafting materials in the house to create their bacteria.
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