how does the moon influence tides?
540657
The desity of water makes it more suseptable to the pull of the moon's gravitation. Depening on it's course around the earth throughout the year the tides follow in it's wake. Not just hight tide and low tide are effected byt this but swells and tsunamis. The tides are also effected by plate techtonics but science has yet to decide whether the causation is more that plate tectonics are effected by the same gravitational pull as the ocean tides or my subterrainian thermo tides.
1121654
Tides on earth\nThe gravitational attraction that the Moon exerts on Earth is the cause of tides in the sea. The tidal flow period, but not the phase, is synchronized to the Moon's orbit around Earth. The tidal bulges on Earth, caused by the Moon's gravity, are carried ahead of the apparent position of the Moon by the Earth's rotation, in part because of the friction of the water as it slides over the ocean bottom and into or out of bays and estuaries. As a result, some of the Earth's rotational momentum is gradually being transferred to the Moon's orbital momentum, resulting in the Moon slowly receding from Earth at the rate of approximately 38 millimetres per year. At the same time the Earth's rotation is gradually slowing, the Earth's day thus lengthens by about 15 µs every year. A more detailed discussion follows in the section titled Earth & Moon\n\nEarth & Moon\nTidal effects\n  \nThe tides on Earth are mostly generated by the Moon's gravitation, with a less significant contribution by the Sun. These gravitational effects are specifically manifested as tidal forces. The combination of the two is responsible for spring and neap tides. Two tidal bulges, one in the direction of the Moon, and one in the opposite direction (figure 1) form as a result of the tidal forces. The buildup of these bulges and their movement around the earth causes an energy loss due to friction. The energy loss decreases the rotational energy of the Earth.\n\nSince the Earth spins faster than the Moon moves around it, the tidal bulges are dragged along with the Earth's surface faster than the Moon moves, and move "in front of the Moon" (figure 2). Because of this, the Earth's gravitational pull on the Moon has a component in the Moon's "forward" direction with respect to its orbit. This component of the gravitational forces between the two bodies acts like a torque on the Earth's rotation, and transfers angular momentum and rotational energy from the Earth's spin to the Moon's orbital movement.\n\n \nGalileo spacecraft took this picture of the Earth-moon system \nLunar librationBecause the Moon is accelerated in the forward direction, it moves to a higher orbit. As a result, the distance between the Earth and Moon increases, and the Earth's spin slows down (figure 3). Measurements reveal that, at present, the Moon's distance to the Earth increases by 38 mm per year (lunar laser ranging experiments with laser reflectors are used to determine this). Atomic clocks also show that the Earth's day lengthens by about 15 microseconds (µs) every year.\n\nThis effect is expected to continue until the spin of the Earth has slowed to match the orbital period of the Moon. At that point the tidal effect of the Sun will dominate, further slowing the Earth and thereafter causing the orbit of the Moon to steadily shrink. However these effects would not be expected to occur until long after the Sun has become a red giant.\n\nHowever, the formation of tidal bulges on Earth is irregular and not directly related to the frictional energy loss which accompanies the tides. For example, continents on Earth may cause an increase in frictional energy losses and hamper the buildup of tidal bulges (figure 4).\n\nThe lunar surface is also subjected to tides from earth, and rises and falls by around 10 cm over 27 days. The lunar tides comprise a mobile component, due to the Sun, and a selenographically fixed one, due to Earth (the Moon keeps the same face turned to the Earth, but not to the Sun). The vertical motion of the Earth-induced component comes entirely from the Moon's orbital eccentricity; if the Moon's orbit were perfectly circular, there would be solar tides only. The magnitude of the Moon's tides corresponds to a Love number of 0.0266, and supports the idea of a partially melted zone around its core. Moonquake waves lose energy below 1,000 kilometres in depth, and thi
1011103
Tides are created because the Earth and the moon are attracted to each other, just like magnets are attracted to each other. The moon tries to pull at anything on the Earth to bring it closer. But, the Earth is able to hold onto everything except the water. Since the water is always moving, the Earth cannot hold onto it, and the moon is able to pull at it. Each day, there are two high tides and two low tides. The ocean is constantly moving from high tide to low tide, and then back to high tide. There is about 12 hours and 25 minutes between the two high tides.\n\nSpring Tides\nWhen the moon is full or new, the gravitational pull of the moon and sun are combined. At these times, the high tides are very high and the low tides are very low. This is known as a spring high tide. Spring tides are especially strong tides (they do not have anything to do with the season Spring). They occur when the Earth, the Sun, and the Moon are in a line. The gravitational forces of the Moon and the Sun both contribute to the tides. Spring tides occur during the full moon and the new moon.\n\nNeap Tides\nDuring the moon's quarter phases the sun and moon work at right angles, causing the bulges to cancel each other. The result is a smaller difference between high and low tides and is known as a neap tide. Neap tides are especially weak tides. They occur when the gravitational forces of the Moon and the Sun are perpendicular to one another (with respect to the Earth). Neap tides occur during quarter moons. \n\nIf we had a second moon our tide system would be more complicated.
1098253
The effects it would have on earth would not be noticeable.\nLook at the moon, it is huge compared to the size of meteors.\nAnd although it does affect the tides, it does not really affect pressure.\n\nnow considering the speed of the meteor, if it was coming at us at several thousand miles an hour, we would never be able to measure the effect before it hit us.\n\nIt would affect sea levels only if it hit the ocean and sent big wave from the force of the impact. but mostly we would have no idea it was going to hit us.
60264
Our moon is locked in what is known as a geo-synchronous orbit. For millions of years the angular momentum has stablized the moon to provide very little loss of energy between earth and moon. This does not account for the influences that the moon has upon our oceans though. (Tides) Our solar system has "moved about" for many millions of years to allow for efficient energy transfers between baryonic masses.  This is not unlike a person who sit's in a chair and move's about to become more comfortable.  Peace
17074
The moons gravity is what causes ocean waves. It affects big bodies of water such as oceans or seas but as for water in a toilet I highly doubt because if you think about it, the moon's gravity doesn't effect pond water. The only thing that would affect toilet water is water pressure, and on the global scale the Corriolis Effect. But that only effects the direction of the water when flushed. So the most probable cause is the water pressure of your city.
467653
neap tide is the answer.\n\nExplaination. Since it is the effect of the moon and sun's gavity that causes tides, there are high tides closest and farthest away from the two of them. When they are lined up, spring tide occurs, resulting in the highest and lowest possible tides. However, when the sun, moon, and earth are at a 90 degree angle, the difference between high tide and low tide is the least(Because the effects of gravity are spread out). This is neap tide.\n\nPS. At neap tide there is still a visible distinction between the high and low tides. This is because the sun and moon's gravity and distance from Earth are not the same.
289483
tides are a result of the gravitational pull from the moon
48487
Just a theory, but, the affect of the moon on the human body has been corilated with the affect of the moon on the oceans tides.  The theory states that the human body, being mostly water, responds to the same gravitational affect as the oceans.  The term Lunacy refers to the affect of the moon on a human.  Not sure if there is any hard evidence to sugest this may be an actual physical occurance, but thats the theory.
1028524
The force would be 1/4 what it is now (since gravity follows an inverse-square of distance law). As it is, moon's gravity has next to no effect on our weight on earth, so weight change would be unnoticable. The main effect would be on the tides. Rather than being the primary determinant of tide height, as it is now, the moon would be a secondary influence and the sun would be the primary. This would reduce tidal heights by (very roughly) one half.
650556
First the ocean tides would lessen by about 66% since the Moon effects the gravity of earth.  The sun causes the other portion of tides, so tiedds would continue, just a lesser amount.  After about 1,000 years the season would change because the moon keeps the earth's rotation axis and the plane of the orbit of earth within a narrow range.  That range would widen and there would be a more significant difference in the climate between summer and winter.  Many animals use the sequence of the moon for their life cycles (laying of eggs of the turtle, for instance).  So, these animals' life cycles would change, possibly causing extinction.  Additionally the moon provides nighttime light which many animals depend on for hunting as well as farmers depend on for harvesting.
14381
Oceanic tides are caused by the gravitational attraction of the moon which raises up the ocean water beneath the moon causing a high tide.  On the opposite side of the earth there is another high tide bulge caused in part by the spin of the earth.  On the coast we observe two high and two low tides each day.  As the earth spins the tidal bulge approaches a coast.  The shape of the coast affects the height of the tide.  At the Bay of Fundy in eastern Canada, the tide can equal about 45 feet at times because the tide is pulled into a converging channel that amplifies the tide.  On other coasts, for example Caribbean islands, there is very little tide.  Because the gravitational force of the sun also produces a lesser tide than the moon, the sun and moon work together or against each other in a complex way to vary the height of tides as the earth rotates about the sun in a less than perfect circle and the moon rotates about the earth and the earth spins on its axis.  The angle of the earth's axis relative to the sun changes with the seasons also affecting heights of tides below the sun. \n\nTherefore at selected coastal stations, the tides are measured over long periods ot time in special hollow tubes  with measuring scales (that are not affected by waves) and statistics are collected to predict future tides relative to the positions of the sun and moon.  These data can be extrapolated or interpolated to prepare tide tables for nearby coastal areas that do not have their own measuring tubes.
388807
Tides will become weaker. Other MINOR affects will change our planet, slight changes in the time a season changes. However you should not worry. The moon is thousands of miles away. The moon only gets about 1 inch further every year. 10000 years from now it still will not make a difference. And if the sapce program does what it is claiming to do. This cycle could be slowed down slightly... maybe 7/8 of an inch instead if they really wanted to but that would ba a useless waste of time, money, resources, and brain power. Don't worry the moon wont affect anything for a few million or billion years.
43764
Tides happen in the atmosphere, and even in the ground itself. We can easily measure them with instruments. The solid earth tide is actually quite substantial, but it is still small enough and slow enough that we do not notice it usually. \n\nThere are definitely tides in lakes and in rivers too. Why would there not be ? \n\nIt should be noted that the tides are NOT because the water is attracted to the sun and moon. Tides are because the gravity field from extraterrestrial bodies (including other planets, not just the sun and the moon) is not constant. On one side of the earth, the force on the water is greater than it is on the earth, so the water gets pulled away from the earth. On the other side of the earth, the force on the water is less than it is on the earth, so the water gets left behind in a pile as the earth gets pulled away from the water. \n\nThis is why there are usually 2 tides per day, although it should also be noted that due to resonance effects, there are places with no tides, places with 1 tide per day, and places with more than 2 tides per day.
587803
The moon's gravity as felt on earth is indeed much weaker than that of earth, but it acts on the entire area of the earth, in particular on the earth's water layer, a shell 8000 miles in diameter. This weak but widespread gravity force raises slight bulges only a few feet in height, a small distortion of such a huge shell. The two bulges are located close to the areas nearest to and farthest from the moon, the points of greatest and smallest moon gravitational pull. Rotation of the earth causes these bulges to travel around the earth's water layer. Tide can be thought of as an extremely long wave that occurs at predictable times (about twice a day) with predictable amplitudes. Resonant sloshing in the ocean basins amplifies the water height disturbances on shore.\nThe greater tidal amplitude at full and new moons is due to the additive effect of solar gravity when the sun, earth and moon are all more or less in line. Incidentally, the size of ordinary waves is only marginally related to tides.
879212
Ur additional information is correct. The moon's gravity is what causes Earth's oceans to form tides (moon's gravity vs earth's gravity). Since our bodies are composed of 80% water and a human's brain is submerged in (biological) liquids, we are affected just as well.
884148
Heating, cooling, rotation of the Earth, gravitational pull from sun and moon (which also causes the tides), melting icecaps that decrease the salinity of the oceans, which changes the density of the water, wind...