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Earth, Moon Sun

SOL 6.3

QuestionAnswer
Atmosphere The layer of gas surrounding a planet that is held in place by gravity
Earth's Magnetic Field Magnetic lines of force from Earth's polar north and south, acting like a giant magnet
Axis The imaginary line through Earth that extends from the North Pole to the South Pole and is the center of Earth's rotation
Hemisphere Half of a sphere; Earth and the celestial sphere can be divided into northern and southern or eastern and western hemispheres
Orbit A curved path followed by a satellite as it revolves around an object
Revolution The movement of one object around a center or another object
Rotation The spinning of Earth on its axis that causes day and night to occur
Seasons The four natural divisions of the year based on changes in temperature due to varying amounts of sunlight received (both intensity and number of daylight hours vary); caused by the tilt of Earth during its revolution
Tilt The slant of Earth’s axis, which is 23.5 degrees from vertical compared to Earth’s orbital plane around the Sun; results in the North Pole always pointing toward the North Star
Crescent Moon A shape of the Moon that is smaller than a quarter moon but larger than a new moon
First Quarter Moon When the right half of the Moon is illuminated and the lunar cycle is in the waxing phase
Full Moon The lunar phase when Earth is between the Sun and Moon and all of the illuminated portion is seen from Earth
Gibbous Moon A shape of the Moon that is greater than a quarter moon but less than a full moon
Last or Third Quarter Moon When the left half of the Moon is illuminated and the lunar cycle is in the waning phase
Lunar Cycle The Moon’s repeated pattern of movement and changes in appearance due to its position relative to Earth and the Sun
Lunar Phase The shape of the illuminated portion of the Moon as seen by an observer, usually on Earth
New Moon The lunar phase when the Moon is between the Sun and Earth and none of the illuminated portion is seen from Earth
Created by: user-1648966
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