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Science Unit 1 About 9 minutes

Earth, Moon, and Sun: Day, Night, and Moon Phases

    3 motions in space

    Day, night, years, and Moon phases come from 3 motions.

    Sun Rotation: Earth spins. 1 day The Moon goes around Earth. About 1 month Revolution: Earth goes around the Sun. 1 year
    Rotation: 1 spin of Earth on its axis. Revolution: 1 trip of Earth around the Sun.

    Watch day, night, and the Moon phases

    Sunlight Earth You You see
    Moon phase: the shape of the lit part of the Moon that we see from Earth. Waxing: the lit part gets larger. Waning: the lit part gets smaller.

    Try it

    Move the Moon around Earth

    1. Drag the Moon around its orbit.
    2. Or move the slider to change the day.
    3. Look at the phase that you see from Earth.

    Quick check

    Answer 5 questions. You see your score at the end.