1. Tides & Eclipses Astronomy Page 12 ©Mark Place, 2007-2008

2. Tides

6. What causes
tides?

7. Caused by the
gravitational pull
of the moon & sun

8. Based on the Diagram,
which are larger?
Spring
Neap? or
SPRING
TIDES

9. During which phases of the moon
do neap and spring
tides occur?

10. Neap
Quarter phases
Neap?

11. New and Full Moon
Spring?

12. How many tides a day (24 hours)? 2 high tides 2 low tides
Tide charts - NOAA

13. Rising tides

14. Why are there not exactly
12 hours between tides?
Because the Moon
is always
revolving around
the Earth

16. solar and lunar eclipses?
What’s the
difference between
solar and lunar eclipses?
Solar
Lunar
Earth blocks
Out the moon
Moon blocks
out the Sun

17. What phase? New Moon Solar Eclipse solar eclipse visual
In fact, it is an unlikely coincidence that we see total solar eclipses at all. The Moon is about 400 times smaller than the Sun, but also happens to be about 400 times closer
solar eclipse visual

18. Solar Eclipses through 2020

19. Annular Eclipse May 10, 2013
You'd have to wait an average of 375 years to see two total eclipses from one place.

20. Lunar Eclipse
What phase?
Full Moon

21. lunar eclipse visual

23. May 25, 2013
Lunar Eclipse 2013

24. solar and lunar eclipses
Why don’t we have
solar and lunar eclipses
every month?
The moon’s orbit is
tilted 5° from the
Earth’s orbit.