Lesson 5 - Tides

Tides are the cycle of rising and falling ocean water that repeats approximately ___.

every 12.5 hours

Spring tides are produced during a new moon and ___ moon.

full

___ pulls oll objects in the universe, including the moon and Earth and the sun and Earth, toward each other.

gravity

Changes in the positions of Earth, the moon, and the sun affect the ___ of high tides during a month.

heights

The bulge of water on the side of Earth closest to the moon produces ___.

high tide

A spring tide can occur ___

in any month of the year

The sun's gravity affects the tides, even though its about 150 million ___ from Earth.

kilometers

A neap tide has the ____difference between consecutive low and high tides.

least

Water flows toward the high tides, halfway between them causing ___.

low tides

Tides are caused ___ by differences in how much gravity from the moon and the sun pulls on different parts of Earth.

mainly

A ___ tide occurs when the sun is at right angles to te line between Earth and the moon.

neap

A tide with the least distance between low and high tides is called a(n) ____________________ tide.

neap

A ___ tide occurs when the sun, Earth, and the moon are nearly in a line.

spring

A tide with the greatest distance between low and high tides is called a(n) ____________________ tide.

spring

Neap tides occur ___ a month.

twice

Differences in the moon's and sun's pull on different sides of the Earth cause ___.

tides