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ES Investigation 1

TermDefinition
shadow a dark area where opaque objects block light from reaching the ground
axis the imaginary line around which a planet rotates
compass an instrument for determining directions using a magnetized needle
night the time between sunset and sunrise then 1/2 of the Earth is in the shadow of the Earth
north pole the northernmost point on the earth
north star the star that is located over the north pole, the point around which the entire northern sky turns
orbit to move or travel around an object in a curved path
orientation direction
revolution the circular path an object takes around another object (orbit)
rotation to turn on an axis
sun the star at the center of the of the solar system around which all of the solar system objects orbit
sunrise the time in the morning when the first part of the disk of the sun appears above the horizon in the east
sunset the time in the evening when the last part of the disk of the sun disappears under the horizon in the west
opaque matter that light cannot pass through
horizon the line at the which the Earth's surface and the sky appear to meet
23 1/2 degrees the tilt of the Earth's axis
solstice two times of the year when the Sun's direct rays strike Earth the farthest north or south of the Equator
equinox the time of year when the Sun's rays strike the equator directly
summer solstice the day of the year with the most hours of daylight
winter solstice the day of the year with the least hours of daylight
autumnal equinox Sept 21 or 22; the first day of Fall
vernal equinox March 20 or 21; the first day of Spring
December 21 or 22 winter solstice
June 20 or 21 summer solstice
Created by: Amy Burson
Popular Earth Science sets

 

 



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