Where did the term “lunacy” come from?
What does “apogee” and “perigee” mean?
Aim: How does the moon
affect the earth?

Topic: Unit 8 Earth in Space
 Main Idea: Tides and Eclipses
1) What are tides?
 Cyclic
and
predictable changing
levels of the ocean
water caused by
gravitational pull of
the moon and sun.
2) Which has a greater effect? Why?
The
moon has a greater effect
because it is closer.
Where are the biggest differences
between high tide and low tide?

The Bay of
Fundy in
Nova Scotia
where it
could change
as much as
52.5 feet.
How many high and low tides do we have daily?
3) What are spring tides?
 These
are
the really
high and
really low
tides caused
when the
sun, earth
and moon
are lined up.
3) What are neap tides?
 Low
high tides
and high low
tides when the
earth, moon
and sun are 90o
to each other.
4) What is a solar eclipse?

The moon
blocks the
sunlight and
casts a shadow
on the earth.
 Because the
moon is closer
it can block out
the sun.
4) What is a lunar eclipse?
This is when the moon falls into the earth’s
shadow.
 The moon appears red. Sunlight is being
refracted and projected onto the moon.

Why don’t eclipses happen twice a month?
5) Why don’t eclipses happen
twice a month?
The moon is
tilted at a 5
degree angle to
the earth’s
orbit so at
times it is too
high or low.