Transcript Unit 9 Study Guide

Unit 9 Study Guide
The Moon
does not give
off its own
light, it only
reflects the
light from the
Sun.
Waxing
Crescent
The amount of
sunlight
hitting the
moon causes
it to look
different –
called phases.
You need to
memorize
these phases
in order and
be able to
identify a
picture of Waxing
each phase. Gibbous
Waning
Crescent
New Moon
Last
Quarter
First
Quarter
Full Moon
Waning
Gibbous
The lunar
cycle takes
about 28
days…that’s
about 3 to 4
days per
phase.
Because the
Moon
rotates on
its axis and
revolves
around the
Earth in the
same
amount of
time, we
always see
the same
side of the
moon.
The Earth is tilted on its Axis at an
angle of 23.5 degrees. The Earth
rotates on its Axis every 24 hours.
It is day on the part of the Earth
that the Sun’s light is hitting, and
night on the other side of the Earth.
Seasons are
It takes 365.25 days (12 months)
caused by the
for the Earth to revolve around the
tilt of the Earth
Sun. It moves counterclockwise.
as it revolves
around the
Summer Solstice
Sun. Tilted
June 21st
toward the Sun
is Summer.
Away from the Winter Solstice
Sun is Winter.
B
North Star (Polaris)
Spring Equinox March 21st
Fall Equinox
C
Seasons in the
Northern and
Fall Equinox
Southern
Sept 23rd
Hemisphere are
opposite of
Spring Equinox
each other.
Winter Solstice
Dec. 21st
A
Summer Solstice
D
NH = Northern Hemisphere
SH = Southern Hemisphere
A Solar Eclipse can ONLY
happen during the position
of a New Moon.
A Lunar Eclipse can ONLY
happen during the position
of a Full Moon.
These diagrams show
the position of the
Earth, Moon, and Sun
when there is a Full
Moon and a New
Moon.
The bulge on the Earth shows the high tide caused
by the pull of the Moon’s gravity on Earth’s water. It
is low tide where it is not bulging.
When the Sun,
Earth, and Moon
are at right angles
to each other, a
Neap Tide occurs.
When the Sun,
Earth, and Moon
are in a straight
line, a Spring Tide
occurs.