Flashcards in lesson 2 unit 2 Deck (5)
the top zone of soil and rock where water fills voids. In other words, it is water under the surface that will eventually make its way into open water sources.
dichloro-diphenyl-trichloroethane, better known as DDT
This pesticide was widely used to control insect populations, particularly mosquitos and flies.
a community of interdependent organisms in an environment
This layer of air forms a barrier between the Earth’s atmosphere (what we breathe) and the sun. It is about 15 miles above the Earth’s surface. Without the ozone layer, we would be subject to the direct rays of the sun, which would be more than life on Earth could handle. Scientists noticed the thinning of the ozone layer in the early 1970s and have been contemplating how to manage this change ever since. As more sun gets through, the Earth becomes warmer.