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Chapter 27.2-27.3 Vocab

albedo, highlands, maria, rilles, impactcraters, ejecta, rays, regolith, elipticplane, solstice, equinox, synchronousrotation, solareclipse, perigee, apogee, lunareclipse
Across
Formed when objects from space crashed into the lunar surface
Closest point in the Moon's orbit
Dark, relatively smooth plains, which average 3 m lower in elevation
State at which its orbital and rotational periods are equal
Occurs when the moon passes directly between the Sun and the Earth and blocks the Sun from view
The furthest point in the Earth's orbit
Layer of loose, ground up rock
Down
Heavily cratered regions of the moon that are light in color and mountainous
Plane of Earth's orbit
Earth's axis is perpendicular to the sun's rays and noon is directly overhead at the equator
Material blasted out during these impacts and fell back to the moon's surface
Valleylike structures that might be collapsed lava tubes
Occurs when the moon passes behind Earth in relation to the sun and through Earth's Shadow
Sun is overhead at its farthest distance either north or south of the equator
Percentage of incoming sunlight that reflects
Long trails of ejecta that radiate outward from the impact site