We dedicate this book to Dr. McLaughlin.
With love,
Grace, Kabita, Jocelyne, and Taylor <3

Tides are waves that cause the sea to rise and fall along the shore all around the world. Tides exist because of the gravitational pull of the moon and the sun, but depend on where the moon and the sun are in relation to the ocean as the Earth rotates on its axis.

What are tides?

The gravitational pull of the sun and the moon causes two bulges or high tides in the ocean on opposite sides of the Earth. The moon, however, has more power to pull the tides because it is closer to Earth than the sun.
Gravitational Pull


Tidal constituents are forces that contribute to tides. The moon's gravitational force is a major contributor to tides even though it is much smaller than the sun's. Though the sun and moon have a gravitational force, but the moons tidal force is stronger because it is closer to the Earth.
What causes tides?


Activity!
In this activity you will be building a model comparing the tide periods for high tide to low tide then high tide to high tide.
This represents the animation below!
Modeling Tides

YAY!
http://dusk.geo.orst.edu/oceans/PPT/TidalCycleV2.html
Click to watch animation!
Terrestrial tides cause displacements of the Earth's solid surface. Since the terrestrial tides cause a displacement, it changes an objects the precise location on Earth. Objects move 55 centimeters (22 inches) a day, which isn't much but does make a difference after some time.
Terrestrial Tides



Tidal Force is a secondary effect of gravitational forces between two objects, which are the Earth and the moon. The moon exerts a tidal force on the whole planet, but doesn't effect much since everything is less flexible.
Tidal Force



Click the link to watch the video!
https://www.youtube.com/watch?v=KlWpFLfLFBI
What type of tides are there?
There are four main types of tides. We have high tides, low tides, neap tides, and spring tides. Neap and spring are similar to either high or low tide, all differing slightly.
High Tides
Differences in gravitational force allow the ocean to bulge outward in two places at the same time. One bulge occurs on the side of the Earth facing the moon. This is the moon’s direct tidal force pulling the ocean toward it. The other bulge occurs on the opposite side of the Earth. Here, the ocean bulges in the opposite direction of the moon, not toward it. The bulge may be understood as the moon’s tidal force pulling the planet (not the ocean) toward it. These bulges in the ocean waters are known as high tides.



Neap Tides
When the sun and moon are 90 degrees apart in relation to the Earth (similar to half moons), causing tides to not be as high as they normally are. This is due to the Sun's mass working against the Moon's pull.

Low Tides

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We dedicate this book to Dr. McLaughlin.
With love,
Grace, Kabita, Jocelyne, and Taylor <3

Tides are waves that cause the sea to rise and fall along the shore all around the world. Tides exist because of the gravitational pull of the moon and the sun, but depend on where the moon and the sun are in relation to the ocean as the Earth rotates on its axis.

What are tides?

The gravitational pull of the sun and the moon causes two bulges or high tides in the ocean on opposite sides of the Earth. The moon, however, has more power to pull the tides because it is closer to Earth than the sun.
Gravitational Pull


Tidal constituents are forces that contribute to tides. The moon's gravitational force is a major contributor to tides even though it is much smaller than the sun's. Though the sun and moon have a gravitational force, but the moons tidal force is stronger because it is closer to the Earth.
What causes tides?

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