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UExcel Earth Science: Earth Sciences Basics
UExcel Earth Science: The Properties of Matter
UExcel Earth Science: Earth Spheres and Internal Structure
UExcel Earth Science: Plate Tectonics
UExcel Earth Science: Minerals and Rocks
UExcel Earth Science: Earth Water
UExcel Earth Science: The Atmosphere
UExcel Earth Science: Earthquakes
UExcel Earth Science: Earth History
UExcel Earth Science: Earth Energy
Free Online UExcel Earth Science Courses
The atmosphere is a mixture of nitrogen (78%), oxygen (21%), and other gases (1%) that surrounds Earth. High above the planet, the atmosphere becomes thinner until it gradually reaches space. It is divided into five layers. Most of the weather and clouds are found in the first layer.
Climate and Pollution
Pollution is the introduction of contaminants into the natural environment that cause adverse change.
The difference between weather and climate is a measure of time. Weather is what conditions of the atmosphere are over a short period of time, and climate is how the atmosphere "behaves" over relatively long periods of time.
A violent disturbance of the atmosphere with strong winds and usually rain, thunder, lightning, or snow.
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