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14 Cards in this Set

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  • Back
chemical
any substance that has definite composition
Ozone
chemical that forms a protective layer in Earth's atmosphere

formed in stratosphere when ultraviolet radiation strikes Ox
ozone hole
thinning of ozone layer over Antartica
CFC's
synthetic chemicals made of chlorine, fluorine & carbon

used as refrigerants and propellants in aerosol cans
Chemistry
study of matter and the changes it undergoes
Matter
anything that has mass and takes up space
Mass
a measure of the amount of matter
Weight
measure not only o an amount of matter but also the effect of Earth's gravitational pull on that matter
5 traditional branches of Chemistry
organic, inorganic, physical, analytical and biochemistry
5 steps of scientific method
observation, hypothesis, experiments, data analysis, & conclusion
pure research
research that seeks to gain knowledge for the sake of knowledge itself.
technology
practical use of scientific information
theory
explanation supported by many, many experiments
model
visual. verbal and or mathematical explanation of experimental data