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eclipses and tides.notebook
1
February 13, 2015
Jan 198:44 PM
Lunar Eclipses and TidesE.1.1 Explain how the relative motion and relative position of the Sun, Earth and Moon affect the seasons, tides, phases of the moon and eclipses
How does the relative location of the sun, moon and Earth affect the tides?
What happens during a lunar eclipse?
What happens during a solar eclipse?
Jan 198:46 PM
Warm up:
1. The first two weeks of the moon cycle is referred to as what type of moon?
2. The last two weeks of the moon cycle is referred to as what type of moon?
3. What is another name for a full moon?
Jan 198:51 PM
Eclipse occurs when a shadow makes the Sun or the Moon seem to grow dark.
Lunar Eclipse the Moon darkens
Solar Eclipse the Sun darkens
Umbra the darkest part
Penumbra a spreading cone of lighter shadow
Words to know
Jan 198:57 PM
Lunar Eclipse The Moon becomes dark during a lunar eclipse because it passes through Earth's shadow.
Jan 199:04 PM
Solar Eclipse The Sun seems to darken because the Moon's shadow falls onto part of Earth.
https://www.brainpop.com/science/space/eclipse/
Feb 139:38 AM
Solar Eclipse viewed from Palm Cove, Australia (11/14/12)
eclipses and tides.notebook
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February 13, 2015
Feb 139:40 AM
Blendspace Watch the videos/demonstrations on slides
# 16
Jan 207:32 AM
Turn and talk:
In the past we have mentioned waves and tides, how do you think Earth's tides are created?
Tides
Tides occur because the Moon's gravity
changes the shape of the Earth's oceans.
Jan 207:35 AM
Tides occur because the Moon's gravity changes the shape of the Earth's oceans....
What does that mean?
The Moon pulls on different parts of Earth with different amounts of force.
It pulls hardest on the side nearest to it, and a little less hard on the center of Earth, and even less hard on the farthest side of the Earth.
Jan 207:45 AM
Think of the Earth as a large flexible object. If that were the case, the Moon's pull would pull Earth into a football shape.
Earth has a crust made out of rocks, so it is strong enough to resist being pulled in different directions. However, the oceans cannot resist the pull, so they change shapes.
Jan 209:43 AM
Earth's changing oceansThe side of the Earth that is closest to the Moon has a bulge of water, along with the side of the Earth that is farthest from the Moon.
The water is thinnest in the middle between the two bulges because water is being pulled from the center on either side.
Jan 209:48 AM
Earth's changing oceansThis "center" and "sides" changes as the Earth turns on its axis. This is why in certain areas the water level rises and falls; high tide and low tide.
Tide cycle 4 tide changes in one day.
High tide water is at its thickest.
a quarter turn later, period of 6 hours, the location has moved to the thinnest layer.
Low tide the thinnest layer of water.
another high tide and low tide complete the cycle
https://www.brainpop.com/science/earthsystem/tides/
high/low tide in CA
eclipses and tides.notebook
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February 13, 2015
Feb 139:48 AM
Space Science: The Basics:
Our Revolving Earth and Moon
(14 min)
Jan 209:58 AM
Ticket out the door
If you were on the Moon's near side during a new moon, how much of the side of Earth facing you would be sunlit?
If Earth did not turn how much would the pattern of tides be affected?
