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13 Cards in this Set

  • Front
  • Back

phases

the different shapes of the moon seen from Earth

eclipse

when the moon's shadow directly hits Earth or the Earth's shadow directly hits the moon

solar eclipse

when the moon passes directly between Earth and the sun

umbra

the darkest part of a moon's shadow

penumbra

the larger part of the moon's shadow, it is not as dark as the umbra

lunar eclipse

when Earth is directly between the moon and the sun

tide

the rise and fall of ocean water

spring tide

when the sun, the moon, and Earth line up, a spring tide occurs

neap tide

when the sun's pull is at right angles with the moon's pull, a neap tide occurs

telescope

a device built to observe distant objects by making them appear closer

maria

dark, flat areas on the moon's surface

craters

round pits that mark the moon's surface

meteoroids

chunks of rock or dust from space