GED Science Practice 2025 – 400 Free Practice Questions to Pass the Exam

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Question: 1 / 400

What is fog?

a long narrow inlet of the sea between steep cliffs

an atmosphere in which visibility is reduced because of a cloud of some substance

Fog is indeed defined as an atmosphere in which visibility is reduced due to the presence of tiny water droplets or ice crystals suspended in the air. These water droplets condense when the air cools and reaches saturation, creating a cloud that hovers close to the ground. This phenomenon significantly decreases visibility, sometimes to less than a few hundred meters, which can affect transportation and the general environment.

The other choices describe different concepts: one refers to a geographical feature (a long narrow inlet of the sea), while others define ecological communities and food webs, which are unrelated to the formation or nature of fog. Therefore, the selection that highlights reduced visibility due to water droplets effectively captures the essence of what fog is.

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a community of organisms where each member is eaten in turn by another member

(ecology) a community of organisms where there are several interrelated food chains

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