MTTC Integrated Science Exam
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Independent Variable - The experimental factor that is manipulated; the
variable whose effect is being studied. Placed on the x-axis (horizontal) on
a graph.
Dependent Variable - The variable that is measured in an...
Empirical Evidence - ✔✔All evidence is empirical; all evidence must be
observed by the five sense.
Peer-reviewed Journals - ✔✔Most accepted source for information on
scientific experiments and studies
Air Pollution - ✔✔Chemicals in the air; include carbon monoxide, sulfur
dioxide, and chlorofluorocarbons (CFC's)
Water Pollution - ✔✔Contaminants enter water by ground runoff or by
leaching
Thermal pollution - ✔✔Factories dump water at high temperatures which
increases normal water temperatures. This means the water can hold less
gas, disrupting the ecosystem
Greenhouse gasses - ✔✔I.e. carbon dioxide and nitrous oxide.
Concentration of them is increased by burning fossil fuels. These gasses
absorb and trap heat, therefore warming the planet
Acid ran - ✔✔Sulfur and nitrous oxides converted to acids and contaminate
water supplies
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