7th Grade Science Vocabulary 7.9A Characteristics of the Solar System

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Solar System

The distance that the Sun's gravity governs the motions of planets and other bodies; defines our Solar System

Sun

The most massive object in the system, a medium sized star that provides energy and gravitational force to govern the orbits of surrounding bodies

Atmosphere

The entire mass of air that surrounds Earth made up of 78% nitrogen, 21% oxygen, and trace amounts of other gases

Temperature

A quantifying measurement used to represent the sensations of "how hot" or "how cold", expressed in degrees Celsius or Fahrenheit

Earth's Magnetic Field

Earth has a polar north and south from which magnetic lines of force are present like a giant magnet

Magnetosphere

An area that deflects and traps harmful particles; resulting from an interaction of Earth's magnetic field with solar "wind" (charged plasma) streaming from the Sun

Ozone Layer

Ozone gas in Earth's atmosphere that absorbs most of the damaging high energy ultraviolet radiation from the Sun

Water

A requirement for life as we know it; exists on Earth as a solid, liquid, and gas

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