The Earth,
the Moon,
and the Sun
What do we call a
scientist who
studies the planets
and stars?
astronomer
How long does it take
for the Earth to revolve
around the sun?
365 1/4
days
How long does it
take for the Earth
to rotate on its
axis?
24 hours
What does the
tilt of the earth
on its axis
cause?
the seasons
More direct rays from the
sun cause ________.
summer
Slanted rays from the
sun cause _______.
winter
Earth is
the
_______
third
planet
from the
sun.
Earth’s surface is
constantly _________.
changing
Earth’s surface is
three-fourths
_______.
water
What 2 things make it
possible for there to be
life on Earth?
What is at the center of
our solar system?
SUN
How much bigger is
the sun’s diameter
than the Earth’s?
110 times
How far away is
the sun from the
Earth?
92 - 95
million miles
What is the sun
made of?
Hot, glowing gases
What are the dark patches
visible on the sun’s surface?
What is the
Earth’s only
natural
satellite?
the moon
How far away
is the moon
from the Earth?
250,000 miles
How big is the moon
compared to the Earth?
One-fourth
the size of
the Earth
The moon has
extreme
temperatures. This
means it is very
______ in the
hot
daytime and very
cold
______ at night.
Why is it not possible
for there to be life on
the moon?
No air & little water
What is the moon’s
surface covered with?
Craters,
mountains,
and flat
plains
We learned about the
moon when:
• Astronauts collected
rocks and soil from the
moon
• Astronauts set up
experiments on the moon
What is the moon
phase when we see
all of the lighted
side of the moon?
full
What is the moon phase
when all of the lighted
side of the moon is
turned away from us?
new
When the moon is ________
waxing
we see more of the lighted
side each night.
waning
When the moon is _______
we see less of the lighted
side each night.
During which moon
phase do we see
only a very small
part of the lighted
side?
Crescent
During which phase do
we see almost all of the
lighted side of the
moon?
Gibbous
During which moon
phase is the moon
between the Earth
and the sun?
New Moon
Who believed in an
earth-centered solar
system?
Earth
Sun
Aristotle and Ptolemy
Who believed in a
sun-centered solar
system?
Earth
Sun
Galileo and Copernicus
Who built the first
telescope?
Galileo