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Tide rise and fall of the sea level under the gravitational pull of the moon Eclipse the partial or total blocking of one object in space by another Solar Eclipse occurs when the Moon passes directly between the Sun and Earth during a new moon Lunar eclipse occurs when Earth is directly between the sun and the moon During a full moon Spring tide a tide with the greatest difference between low and high tides during a new and full moon Neap tide a tide with the least difference between low and high tides During a first and last quarter moon Umbra the darkest part of a shadow Creates a total eclipse Penumbra the part of a shadow surrounding the darkest part Creates a partial eclipse