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earth moon sun fact sheet science space simple tes sided double kids information planets text communication4all facts grade solar system
seasons equinox solstice rotation equal
activities kindergarten elementary teaching teks phases matahari bumi karakteristik identify bulan crater lernen
orbit phases middle elementary discover planets
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seasons tilt earth hemisphere axial winter northern axis when sun moon causes tilted which southern summer does solstice picture way
seasons sun earth moon system orbit does causes distance cause changes seasonal elliptical year each changing