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Fog is really a cloud that forms close to the ground.

Fog is really a cloud that forms close to the ground.

When the air near the ground gets cool and damp, fog appears. Walking through fog feels like being inside a cloud.

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More facts about Sky

The sky looks blue because sunlight spreads out in the air. The sky looks blue because sunlight spreads out in the air. Clouds are made of tiny water drops floating in the air. Clouds are made of tiny water drops floating in the air. At sunset the sky can turn orange, pink, and red. At sunset the sky can turn orange, pink, and red. You can sometimes see the Moon in the daytime sky. You can sometimes see the Moon in the daytime sky. Some clouds float higher up than airplanes fly. Some clouds float higher up than airplanes fly.