Unformatted text preview: Earth Theory: • A theory is an explanation of the general principles of certain phenomena with considerable facts to support it • A theory remains valid only if every new piece of information supports it • If a single piece of available information does not support a theory, then the theory (as proposed) is disproved Fact: • An indisputable truth Example: • It is a fact that on June 30, 1908 in Tunguska, Siberia, an explosion equivalent to about 15 million tons of TNT occurred. • It is a theory that this explosion was due to a natural, extra-terrestrial phenomenon and not to an activity associated with man. • One hypothesis is that a comet collided with the Earth (a competing hypothesis is that a small black hole collided with the Earth)...
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- Fall '10
- Chemistry, NEW hypothesis, e.g. graduate students