Vocab
A collection of billions of stars, dust, and gas that is held together by gravity...
galaxy
What does Earth have that the moon does not have?
atmosphere
As the moon appears to get larger, what phase is it in?
waxing
Planets in our solar system orbit...
the Sun
When a meteor strikes the Earth's surface, it is called...
a meteorite
an object in space that produces its own energy, including heat and light...
star
What is the attraction between an object and Earth called?
gravity/gravitational pull
How long is the moon's orbit around the Earth?
about one month
Which is the hottest planet?
Venus
the apparent shapes of the moon in the sky...
moon phases
any of the patterns of stars that can be seen in the night sky from here on Earth...
constellation
How long does it take Earth to make one rotation around its axis?
24 hours/1 day
The moon does not produce its own light. Where does the moon get its light from?
reflection from the sun
The only planet with liquid water is...
Earth
asteroids
one complete trip around an object in a circular or nearly circular path...
revolution
How long does it take Earth to complete one revolution around the Sun?
365 days/1 year
The moon's gravitational pull creates what on Earth?
tides
Which planet is closest to the Sun?
Mercury
What unit do scientists use to measure distance in space?
light-years
a complete spin on an axis...
rotation
What results from Earth's tilted axis and its revolution around the Sun?
Seasons
The moon cannot be seen at all during which moon phase?
new moon phase
Planets revolve in _____ orbits around the Sun?
elliptical
A ____ is a large round object in space that orbits a star.
planet