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16 terms

9th grade science chapter 25

STUDY
PLAY
Geo
means earth
Helio
means sun
Ecliptic plane
is an imaginary plane containing the Earth's orbit
Moon
is a relatively small natural body in space that revolves around a planet
astronomical units (AU
Distance from the sun is measured
Maria
are low (dark), flat plains formed by ancient lunar lava flows.
Meteoroids
are chunks of rock that move through the solar system.
phases
The different shapes of the moon visible from Earth
Waxing
opening
Waning
closing
eclipse
the shadow of one body in space, like a planet or moon, falls on another.
Umbra
darkest part of the moon's shadow
Penumbra
a region of shadow that is less dark than umbra.
Tides
the regular rise and fall of ocean waters
terrestrial planets
are planets similar in structure to Earth
Kuiper belt
is a wide belt that extends from Pluto's orbit out to about 100 AU or more from the sun.