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eclipses
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Published on Nov 24, 2015
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1.
eclipses and tides
by Elizabeth Sloane
Photo by
Gustavo Fernando Durán
2.
eclipses
Photo by
redtim
3.
Eclipses
A solar eclipse occurs when the moon gets between the earth and the sun
The moon casts a shadow over the earth
A solar eclipse can only take place during the moon phase of the new moon
There are 2 different types of eclipses- solar eclipses and lunar eclipses
Photo by
davedehetre
4.
Solar eclipse
It occurs during the new moon phase
It is when the moon passes directly between the Sun and the Earth
It's shadow falls upon earths surface
Photo by
NASA Goddard Photo and Video
5.
LuNAR ECLIPSE
It occurs when the moon passes directly behind Earth into it's shadow (umbra)
This occurs when the Earth and Moon are aligned (in syzygy)
A lunar eclipse can only occur during a full moon
Photo by
David Holt London
6.
FUN FACTS ABOUT ECLIPSES
Lunar eclipses can occur up to 3 times a year
They usually alternate going by: Lunar, solar, lunar
The maximum time a lunar eclipse can last is 3hrs & 40min
The maximum time a solar eclipse can last is 7min & 40sec
Lunar eclipses are visible over an entire hemisphere
Solar eclipses are visible over a narrow path & a maximum of 167 miles wide
Photo by
Dylan Parker
7.
TIDES
Photo by
Luton
8.
tIDES
They are the rise and fall of sea levels
They are caused by the combination of gravitational forces exterted by the moon,sun, and rotation of the earth
There are 2 different types of tides: Spring tides & Neap tides
Photo by
tomasz.cc
9.
Spring tides
They are especially strong tides
Contrary to their name they have nothing to do with the season of spring
They occur when the Earth, Sun, and Moon are in a line
The gravitational forces of the Moon and the Sun both help the tides
They occur during both the Full moon & the New moon
Photo by
jacilluch
10.
Neap tides
This is a tide just after the first and third quarters of the moon
During this time there is a small difference between high and low waters
Photo by
HighTechDad
11.
Fun facts about tides
The type of gravitational force that causes tides are known as tractive forces
The highest tides in the world are recorded in Canada
Offshore the difference in tides are usually less than 1.6ft.
The suns gravity also produces tides but the strength is greatly reduced
Spring and Neap tides are about 20% higher or lower than average
Photo by
sara biljana (account closed)
12.
The end
Photo by
viking_79
Elizabeth Sloane
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