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Solar System Charact

7.9A Solar System Characteristics That Allow Life to Exist on Earth

TermDefinition
ATMOSPHERE Entire mass of air that surrounds Earth, made up of 78% nitrogen, 21% oxygen, & trace amounts of other gases.
OZONE LAYER Gas in Earth’s atmosphere that absorbs most of the damaging high-energy ultraviolet radiation from the Sun.
ULTRAVIOLET RADIATION Portion of the electromagnetic spectrum emitted by the Sun; can cause tanning, sun burning, & skin cancers.
SOLAR WINDS Continuous stream of charged particles from the Sun, w/ variations in the stream causing beautiful aurora displays (northern lights), & geomagnetic storms that knock out power grids on Earth.
EARTH'S MAGNETIC FIELD Magnetic lines of force from Earth’s polar north & south, acting like a giant magnet.
MAGNETOSPHERE Area that deflects & traps harmful particles; resulting from an interaction of Earth’s magnetic field with solar “wind” (charged plasma) streaming from the Sun.
SOLAR SYSTEM Collection of planets & their moons in orbit around a sun, together with smaller bodies in the form of asteroids, meteoroids, & comets.
COMPOSITION Combination of parts or elements that make up something; e.g., Earth's atmosphere is composed mostly of nitrogen (78%), oxygen (21%), & trace amounts of CO2, ozone, water vapor, & other gases.
PROXIMITY Nearness in space, time, or relationship; e.g., Earth's proximity to the sun allows it to maintain proper temperatures to sustain life.
Created by: trauberk
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