The Earth's rotation and the gravitational pull of the sun and moon create tides. Because the moon is much closer to Earth than the sun, the moon exerts a much stronger gravitational pull.
The Earth's oceans respond to the moon's gravitational pull by bulging and dipping as the moon rotates around the Earth. As the ocean bulges toward the moon, a high tide is created. The high tide on the side of the Earth facing the moon is called the high high tide. The high tide caused by the bulge on the opposite side of the Earth is called the low high tide. (A low high tide may be understood as the moon's tidal force pulling the planet—not the ocean—toward it.)
Term Part of Speech Definition Encyclopedic Entry Earth Noun
our planet, the third from the Sun. The Earth is the only place in the known universe that supports life.
Encyclopedic Entry: Earth exert Verb
to force or pressure.
gravitational pull Noun
the physical attraction between two objects.
high high tide Noun
tide created when the Earth directly faces the moon.
high tide Noun
water level that has risen as a result of the moon's gravitational pull on the Earth.
low high tide Noun
tide created when the Earth faces away from the moon.
Earth's only natural satellite.
large body of salt water that covers most of the Earth.
Encyclopedic Entry: ocean planet Noun
large, spherical celestial body that regularly rotates around a star.
Encyclopedic Entry: planet rotate Verb
to turn around a center point or axis.
object's complete turn around its own axis.
Encyclopedic Entry: rotation sun Noun
star at the center of our solar system.
tidal force Noun
gravitational pull exerted by one object, such as the sun or moon, that raises tides on another object, such as the Earth.
rise and fall of the ocean's waters, caused by the gravitational pull of the moon and sun.
Encyclopedic Entry: tide