Earth Science : Tides & Lunar Cycles Quiz

Quiz
*Theme/Title:	Tides & Lunar Cycles
* Description/Instructions
Tides occur because of the periodic rise and fall in sea level with respect to the land. They are produced by the pull of the moon on the Earth. The moon pulls on the Earth due to gravitiational forces, but the Earth can resist it. The moon pulls upward while the Earth pulls down. Earth’s oceans are always moving, so it cannot hold on to the water. The moon is therefore able to pull on the oceans. Each day there are two high tides and two low tides. The oceans move constantly between high tides and low tides. The time between high and low tides is approximately six hours. When the moon is aligned with the sun, the gravitational pull on the Earth is very strong. These tides are called spring tides. When the moon and sun are not aligned, the gravitational forces cancel each other out. The tides are weak, and they are referred to as neap tides. Spring tides occur during the full moon and the new moon, when the sun lines up with the moon. Neap tides occur during the first quarter and the last quarter, when the sun is perpendicular to the moon. This quiz covers the basics of tides and tidal forces. Use the above information to assist in answering the questions. Select the best answer from the choices.
Group:	Science Science Quizzes
Topic:	Earth Science

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