Transcript Tides

Tides
• Tides are the regular rise and fall of the
water level.
• The moon creates tides through the pull of
its gravity.
• The pull isn’t strong enough to affect the
crust or other landforms, but it is enough
to cause a noticeable bulge in the ocean.
• The high-tide bulge always stays with the
moon as it travels around Earth.
Seasons
Earth’s Tilt
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The tilt of Earth’s rotational axis and the
Earth’s orbit around the sun work together to
create the seasons.
Earth’s constant tilt causes the two
hemispheres to be exposed to different
intensities of sunlight throughout the year.
Solstices
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During the summer solstice, the northern
hemisphere gets more direct sunlight causing
longer days.
At this time, the southern hemisphere gets the
least direct sunlight.
During the winter solstice, the northern
hemisphere gets the least direct sunlight,
causing shorter days.
At this time, the southern hemisphere gets the
most direct sunlight.
Equinoxes
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During the vernal & autumnal equinoxes,
neither the north or south hemisphere is
inclined toward the Sun.
On the vernal (spring) equinox and the
autumnal (fall) equinoxes, day and night are
about the same length all over the world.