# data[].attributes.headline
Tides are caused by the moon's gravitational pull.

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Tides are caused by the moon's gravitational pull.

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When the moon revolves around the Earth, it's gravity pulls the water up and when the moon is away from the water, it goes down.

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Tides are one of the most reliable phenomena in the world. 

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Tides are one of the most reliable phenomena in the world. 

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Tides are when the waves in oceans and lakes rise up and shrink down. They cause seaweed and sand to pile up on beaches.

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There are two high tides and two low tides each day.

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There are two high tides and two low tides each day.

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During any 24 hour period, the moon nearly completes one revolution around earth [apparent motion, not true motion]. Combined tidal forces cause a bulge in the earth's water at the location roughly below the moon and also at the part of the earth opposite that location.

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Two types of tides are spring tides and neap tides.

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Two types of tides are spring tides and neap tides.

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Spring tides happen when the moon and Sun are aligned and they are dramatically higher and lower than other tides. Neap tides are when the Sun and Moon are not aligned and they way less dramatically high and low.

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Why is there a bulge on the other side of the Earth that the moon is on?

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Why is there a bulge on the other side of the Earth that the moon is on?

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Because the moon isn't just pulling on the water, it pulls on the Earth too. So it leaves that big bulge on the other side of the Earth.

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What would happen to the tides if there was no land on Earth?

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What would happen to the tides if there was no land on Earth?

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The water tides and bulges would stay in line with the moon as it orbits the Earth.

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What are the tides called if they are somewhat the same?

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What are the tides called if they are somewhat the same?

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They are called semi-diurnal because if there is a little difference in the tides, than they are called mixed diurnal. If they get one high and one low tide a day, it's called diurnal. 

# data[].attributes.subject
They are called semi-diurnal because if there is a little difference in the tides, than they are called mixed diurnal. If they get one high and one low tide a day, it's called diurnal. 