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the layer of Earths atmosphere contains the ozone layer an important layer that helps protect life on earth from UV radiation
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Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back
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Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution
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the layer of Earths atmosphere contains the ozone layer an important layer that helps protect life o...
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