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Atmosphere
The gaseous portion of a planet, the planet's envelope of air; one of the traditional subdivisions of Earth's physical environment.
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Climate
A description of aggregate weather conditions; the sum of all statistical weather information that helps describe a place or region.
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Elements (Atmospheric)
Quantities or properties of the atmosphere that are measured regularly and that are used to express the nature of weather and climate.
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Meteorology
The scientific study of the atmosphere and atmospheric phenomena; the study of weather and climate.
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Weather
The state of the atmosphere at any given time.
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Hypothesis
A tentative explanation that is tested to determine whether it is valid.
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Theory
A well-tested and widely accepted view that explains certain observable facts.
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serendipitous
come upon or found by accident; fortuitous:serendipitous scientific discoveries.of, relating to, or suggesting serendipity.good; beneficial; favorable:serendipitous weather for our vacation.
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Biosphere
The totality of life-forms on Earth.
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Geosphere
The solid Earth, the largest of Earth's four major spheres.
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Hydrosphere
The water portion of our planet; one of the traditional subdivisions of Earth's physical environment.
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Interface
A common boundary where different parts of a system interact.
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Earth Science
Aims to study Earth as a system composed of numerous interacting parts, or subsystems.
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System
A group of interacting, or interdependent, parts that form a complex whole.
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Hydrologic Cycle
The continuous movement of water from the oceans to the atmosphere (by evaporation), from the atmosphere to the land (by condensation and precipitation), and from the land back to the sea (via stream flow).
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Heat
The kinetic energy of random molecular motion.
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Ozone
A molecule of oxygen containing three atoms.
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Photosynthesis
The production of sugars and starches by plants using air, water, sunlight, and chlorophyll. In the process, atmospheric carbon dioxide is changed to organic matter and oxygen is released.
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Radiation
The wavelike energy emitted by an substance that possesses heat. This energy travels through space at 300,000 kilometers per second (the speed of light).
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Aerosols
Tiny solid and liquid particles suspended in the atmosphere.
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