Vocabulary Chapter
Published on Nov 18, 2015
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PRESENTATION OUTLINE
EARTH AND SPACE
VOCABULARY
SOLAR SYSTEM
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The sun together with all the planets and other bodies that revolve around it.
ROTATION
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A rotation is a circular movement of an object around a center of rotation. A three-dimensional object always rotates around an imaginary line called a rotation axis.
REVOLUTION
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A rotation is a circular movement of an object around a center of rotation. A three-dimensional object always rotates around an imaginary line called a rotation
TROPICS
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each of two corresponding circles on the celestial sphere where the sun appears to turn after reaching its greatest declination, marking the northern and southern limits of the ecliptic.
POLAR REGIONS
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The polar regions of Earth, also known as Earth's frigid zones, are the regions of Earth surrounding its geographical poles.
SOLSTICE
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A solstice is an astronomical event that occurs twice each year as the Sun reaches its highest or lowest excursion relative to the celestial equator on the celestial sphere. The solstices, together with the equinoxes, are connected with the seasons.
EQUINOX
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An equinox occurs twice a year, around 20 March and 22 September. The word itself has several related definitions. The oldest meaning is the day when daytime and night are of approximately equal duration.
ATMOSPHERE
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An atmosphere is a layer of gases surrounding a planet or other material body of sufficient mass that is held in place by the gravity of the body.
LITHOSPHERE
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A lithosphere is the rigid, outermost shell of a rocky planet, and can be identified on the basis of its mechanical properties.
HYDROSPHERE
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