1. Tides are a change’n

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Tides
Daily movements of ocean water that change the level of the ocean’s surface
Influenced by two objects
Sun
Moon
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Back in the day
2000 years ago a Greek explore name Pytheas discovered that the moon phases and tides were related but couldn’t explain it
1687
Sir Isaac Newton
Came up with his theories of gravitational pull
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Gravitational Pull
Gravity of the moon affects every particle on the earth
Liquids will be more noticeable than solids due to their properties
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High Tide and Low Tide
High tides are dependent on the rotation of the moon
Moon pulls the strongest on the area of the earth that is directly facing the moon
If it happens over an ocean
water will bulge towards the moon
at the same time the other side of the earth water bulges due to the motion of the earth
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Low tides
During high tides the water bulges towards the moon
Therefore water must be coming from somewhere
Water is drawn away from the areas that are not directly facing the moon
causing low tides in that area
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Timing the tides
If the earth was rotating at the same time as the moon
High tide would happen at the same time every day
Unfortunately that does not happen
Earth for one rotation 24 hours
Moon 24 hours and 50 minutes
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What if?
If high tide was at 12 o’clock on Saturday what would the time high tide on Sunday?
Answer 12:50
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10. Tides can also be affected by the sun
Though the affect is not felt as much, why?
Sun is larger but further away
There are two tides due to the sun
Spring tides
When the sun, Earth, and Moon all align
Neap Tides
When the sun, Earth and Moon form a 90 degree angle
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Tides hectic plans
Some coastal areas with narrow inlets can feel the affects of tides greatly
These are called tidal bore
Where a body of water rushes up a narrow water way during high tide
Can cause waves
Salt water rushes into fresh waters
During Low tides
Tidal pools are created
Pools of water that is separated by a land mass
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