Question

I. Answer the following questions briefly:
1. Why do tides occur?
2. Why does the high tide change its time everyday?
3. Distinguish between the spring tide and neap tide.
4. What are the effects of tides?​

Answer 1

Answer:

1. Tides are very long waves that move across the oceans. ... Gravity pulls the ocean towards the moon and high tide occurs. The bulge on the far side of the Earth is caused by inertia. The water moving away from the moon resists the gravitational forces that attempt to pull it in the opposite direction.
2. Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart. ... This occurs because the moon revolves around the Earth in the same direction that the Earth is rotating on its axis.
3. Rather, the term is derived from the concept of the tide "springing forth." Spring tides occur twice each lunar month all year long without regard to the season. Neap tides, which also occur twice a month, happen when the sun and moon are at right angles to each other. ... This occurs twice each month.
4. Tides affect coastal regions in different ways. High tides push large amounts of water far up onto beaches and leave the sand and sediment mixed with the water behind when the tide goes out. Therefore, tides transport sand and sediment and shape shorelines. Tides feed estuaries.

Explanation:

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Answer 2

Explanation:

1. Tides are very long waves that move across the oceans. ... Gravity pulls the ocean towards the moon and high tide occurs. The bulge on the far side of the Earth is caused by inertia. The water moving away from the moon resists the gravitational forces that attempt to pull it in the opposite direction.

2. Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart. It takes six hours and 12.5 minutes for the water at the shore to go from high to low, or from low to high.

3. Spring tides occur twice each lunar month all year long without regard to the season. Neap tides, which also occur twice a month, happen when the sun and moon are at right angles to each other. ... This occurs twice each month.

4. Seven days after a spring tide, the sun and moon are at right angles to each other. When this happens, the bulge of the ocean caused by the sun partially cancels out the bulge of the ocean caused by the moon. ... Neap tides occur during the first and third quarter moon, when the moon appears "half full."