Do Now: Read the Tides article and answer the 2 questions · PDF fileBay of Fundy Tides Explained 30 Second Time Lapse Bay of Fundy. Label the four positions as high tide or low tide

Do Now: Read the Tides article and answer the 2

questions

Tim and Moby explain

“Earth’s 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

Label the four positions as high tide or low tide

EARTH

High Tide

Low Tide

High Tide

Low Tide

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

www.weather.com

The End