Moon phaseunitpp tstudent
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Moon phaseunitpp tstudent

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    Moon phaseunitpp tstudent Moon phaseunitpp tstudent Presentation Transcript

    • Chapter 23 Sun-Earth-Moon System
    • Key Terms Rotation – the spinning of Earth on its axis (takes 24 hours ) Revolution – Earth’s yearly orbit around the sun.
    • Key Terms Ellipse – an elongated, closed curve (Earth orbits the Sun this way)
    • Solstices Solstice – the day when the Sun is farthest north or south of the equator. Occurs twice yearly summer & winter (June 21/22 & Dec. 21/22)
    • Moon Rotation/Revolution The Moon’s rotation takes 27.3 days – the same amount of time it takes to revolve once around Earth. Thus, we always see the same side of the Moon!
    • Phases of the Moon The phases of the Moon depend on the positions of the Moon, Earth, and the Sun. There are 8 phases.
    • New Moon Occurs when the Moon is between Earth and the Sun. The lighted ½ faces the Sun, the dark ½ faces Earth. It’s in the sky but can’t be seen.
    • Waxing Phases Occur after a new Moon, and more of the lighted half of the moon can be seen each night. Waxing Crescent – can be seen about 24 h after a new moon as a thin slice.
    • Waxing Crescent
    • 1 Quarter Phase st Can be seen about 1 week after a new moon. Appears to about ½ of the lighted side of the Moon.
    • Waxing Gibbous Occurs when more than ¼ of the Moon is visible.
    • Full Moon Occurs when all of the Moon’s surface facing Earth reflects light. Remember, Earth is between the Sun and Moon.
    • Waning Phases Waning occurs after a full moon, and you see less of its lighted half each night. The lighted parts will be on the left side of the Moon!
    • Waning Gibbous Begins just after a full moon. To me, you can see about ¾ of the lighted Moon.
    • Third-Quarter Phase Occurs when you can see only ½ the lighted side.
    • Waning Crescent Occurs when you can see a small lighted slice on the left side. Will occur just before another new moon.
    •  Once you can located the New and Full moon on a diagram always move counter clockwise from the NEW to the FULL phase. If you go counter clockwise the first set of phases are the WAXING phases then after you reach the FULL moon the set of phases are the waning phases,