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The static group is a two-group experimental design.One group,called the ________,is exposed to the treatment,and the other,called the ________,is not.Measurements on both groups are made only after the treatment,and test units are not assigned at random.
Oak
A group of trees or shrubs in the genus Quercus, known for their durable wood and significance in various habitats.
Hydrogen Fuel Source
A clean energy option using hydrogen gas as fuel, producing water as the only emission when consumed in a fuel cell.
Ozone Depletion
The gradual thinning of the earth's ozone layer in the stratosphere, primarily caused by the release of chemical compounds containing gaseous bromine or chlorine from industry and other human activities.
Carbon Dioxide
A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in the atmosphere and is absorbed by plants in photosynthesis.
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