what are tides? explain and also explain types
Answers
Answer:
There are two main tides that are higher or lower than average. They occur twice monthly and are called neap and spring tides.
Answer:
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth.
High Tides
The side of the Earth facing the moon will have a tidal bulge called the direct tide. Similarly, on the opposite side of the planet, the ocean will also be bulging. This is called the opposite tide, and it happens because the inertial force of the Earth exceeds the gravitational force of the moon at this location. Therefore, high tides occur simultaneously on the the opposite sides of the Earth.
Low Tides
Low tides are the receding waters between the high tides. In some places, low tide can be only a few feet, while in others the ocean can recede much farther. High and low tides both appear two times each in a 24-hour day, but since the moon rises 50 minutes later each day, the tide cycles will differ by the same 50 minutes daily.
Spring Tides
The phases of the moon also affect tides. When the moon is at its full or new moon phase, high tides are at their highest, while low tides are lower than usual. Called spring tides, these tides occur when the sun, moon and the Earth all line up. The added gravity of the sun can make the oceans bulge more than at other times.
Neap Tides
During the moon's quarter phases, the sun pulls against the moon's gravitational pull instead of with it. During these tides, the result is the lowest high tide and the highest low tide -- in other words, the least extreme difference between high and low tides. This is called a neap tide.