During a lunar eclipse, the moon can become either partially or entirely dark. The outer, or penumbral, shadow is an area where the Earth blocks some of the sun's rays from reaching the moon. In contrast, the inner, or umbral, shadow is a region where the Earth blocks all direct sunlight from reaching the moon.
12. During a lunar eclipse, the moon can become either partially or entirely dark. The outer, or penumbral, shadow is an area when the Earth blocks _________ of the sun's rays from reaching the moon. In contrast, the inner, or umbral, shadow is a region where Earth blocks _________ direct sunlight from reaching the moon.
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