Unit 3.3 Tides and Eclipses Notes: Tides and Eclipses
Part 3: Re-read the
highlighted
information in your
notes. Construct
quiz questions
using this
information. Write
the questions next
to the paragraph
where the answers
can be found. Name: __________ Part 1: Fill in the blanks during the class
discussion.
Tides
Ø A tide is when the elevation of the
ocean surface CHANGES due to the
gravitational pull of the sun and the
moon
Ø The moon has a bigger effect on tides
because it is BIGGER
than the
sun.
Ø The height of tides is related to the MOON PHASE
Ø Generally, the largest tides occur during the NEW and _FULL moon
phases
Spring Tides
Ø Spring tides are when the tide changes are very LARGE or HIGH.
Ø Spring tides are very large because the sun-Earth-moon are
LINED UP.
Ø Spring tides occur during the NEW and FULL moon
Neap Tides
Ø Neap tides are when the tidal level changes very SMALL or LOW.
Ø Neap tides are when the sun-Earth-moon are at 90 DEGREE angles
and NOT lined up.
Ø Neap tides occur during the 1st QUARTER _ and LAST QUARTER
moon phases.
Eclipse
Ø “Eclipse means to “COVER UP”
Ø There are two types of eclipses:
1. A solar eclipse when the SUN is covered up by the moon
2. A lunar eclipse when the MOON is covered up by the shadow
of the Earth.
Ø An eclipse can be total or partial.
• Total eclipse means the object is FULLY covered up
• Partial eclipse means you can see PART of the object.
Ø Eclipses are created by object being in a certain part of the other
objects shadow.
• The Umbra is the DARK CENTER part of the shadow and
causes a TOTAL eclipse
• The Penumbra is the LIGHTER OUTSIDE part of the
shadow and causes a PARTIAL eclipse
Solar Eclipse
Ø Occurs when the MOON is between the Sun and Earth
Ø During a total eclipse it is possible the see the CORONA of the sun
Ø The corona is the GLOWING ATMOSPHERE of the sun
Lunar Eclipse
Ø Occurs when the SHADOW of the Earth covers up the moon
Ø The moon turns REDDISH ORANGE in the umbra because of the
refraction of sunlight around the Earth’s atmosphere.
Ø Because the Earth’s shadow is LARGER than the moon’s shadow, a
Lunar Eclipse is more common than a solar eclipse.
Part 2. Re-read your notes. Highlight the most important information