Do Now: Read the Tides article and answer the 2 questions · PDF fileBay of Fundy Tides...
Transcript of Do Now: Read the Tides article and answer the 2 questions · PDF fileBay of Fundy Tides...
What causes Tides?• The force of gravity pulls the _________ and ________
toward each other.
• Tides occur because of differences in how much the
moon pulls on different parts of ______________.
• As Earth __________, the gravity pulls water toward the
point on Earth’s surface ___________ to the moon.
Earth moon
Earthrotates
closest
High Tides• Closest to the Moon, the ________ pulls on water at
Earth’s surface more strongly than on Earth as a whole.
This creates high tide.
• Farthest away from the Moon, ____________ is pulled
on by gravity _________ strongly than the __________
at that point. Earth is pulled __________ from this point,
leaving the water behind. This creates another high tide.
gravity
waterless Earth as a whole
strongly
Low Tides
• Low tides occur between the ________tides..
• Every location on Earth goes through _____ high tides and ______ low tides in a 25 hour cycle.
high
twotwo
Bay of Fundy
Bay of Fundy Tides Explained
30 Second Time Lapse Bay of Fundy
Spring Tides• The sun’s gravity also pulls on Earth’s
waters.
• Twice a month, during the phases of ____ and ____, the Sun, Earth, and moon are
nearly in a line. The combined forces produce a tide with the _______ difference between high and low tides.
new
full
greatest
Neap Tides
• Twice a month, during the ________ and _______ phases, the line between Earth and the ______ is at a right angle to the line between Earth and the _______. This produces a tide with the ______ difference between low and high tide.
first
third
moon
Sun
least
Tide Chart
• How much time is there between the two high tides every day?
• How much time is there between the two low tides every day?
About 12 hours
About 12 hours