Scientific Theory - explains why or how something happens; supported by evidence, Hypothesis - a testable explanation about something based on prior knowledge and observations, Scientific Law - a statement describing what always happens under certain conditions. They are accepted to be true and universal and sometimes expressed as a single equation., Microorganism - a very small living thing, Disease - harmful change causing sickness, Infectious - a disease that can be spread from one organism to another, Cholera - a bacterial disease usually spread through contaminated water, Epidemic - when an infectious disease spreads widely in a community during a specific period, Outbreak - the sudden start of something unwelcome, such as a war or disease, Bacteria - prokaryotic, microscopic, single-celled organisms; exist in every environment, both inside and outside other organisms; some are harmful, but most are useful,

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