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6 Cards in this Set

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What are Chlorofluorocarbons?
They are the compound known as Freon-12. It replaced horrible things like Ammonia in refrigerators and air-conditioning system.
What is chemistry?
the science that deals with the materials of the universe and the changes that these materials undergo.
what are the three steps to solving a problem?
Recognize the problem and state it clearly. This step is called making an observation.

Propose possible solutions to the problem or possible explanations for the observation. This step is called formulating a hypothesis.

Decide which of the solutions is the best or decide whether the explanation proposed is reasonable. This is called performing an experiment.
How CF C's illustrate that technical knowledge can be a double edged sword?
Although it helped to replace bad things it did more damage than good.
What is a theory?
A theory is a set of tested hypotheses that gives an overall explanation of some part of nature. A theory explains why something happens.
What is an observation?
An observation is something that is witnessed and an be recorded.