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Is earth growing?

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Re: Is earth growing?

Unread postby Sys1 » Sat 20 Aug 2011, 04:40:25

Expanding Earth is nonsense. We have GPS which proove tectonic theory by recording continents movements.
It's impossible for Earth to grow because its mass is the same. You can't create mass out of nowhere. Moreover, growing earth can't explain mountains. Third, if Earth mass changes constantly, its speed of revolution around Sun would have to change accordly in order to stay on the same orbit. Forth, you can't have oceans coming out of nowhere. Fifth, if Earth mass expands, then moon would crash on us.
This theory is super BS and those believing in it should get back to school, period.
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Re: Is earth growing?

Unread postby Sixstrings » Sat 20 Aug 2011, 04:46:27

$this->bbcode_second_pass_quote('vision-master', 'M')ost ppl here are very conventional with their thinking and belief systems and tend to be what I call sheeple. Looking outside 'the box' is unacceptable behavior. Just look at the 'cold fusion' thread.


Image

:lol:

I still don't understand this thread. How do you guys make a leap from plate tectonics and continental drift to "the Earth growing."

To the OP..

1. If the continents aren't matching up perfectly from your perspective, well, stuff happens over billions of years. Erosion from wind and water for one thing.

2. Earth has been around for a long time. Almost half as long as the whole universe. It ain't gonna grow, stop looking for it to. If it hasn't gotten super big int the last 4 billion years, and since meteorite impacts are fewer over time, then I doubt you'd notice any size difference between now and the one or two billion years before the sun starts expanding and vaporizes the planet. Not that you or any form of life we'd recognize will be around then to notice anyway.

Also..

Planet sizes in our solar system and what we're observing with the exo-planets have a typical range of sizes. The main growth period is when a planet first forms. As with our moon, very large collisions can add significant mass but even then it's not much difference in the grand scheme of things.

3. Stars are much bigger and more interesting. The piddly range of sizes that planets come in is nothing compared to stars.

Bottom line.. yes a tiny little bit of mass is added from meteorite impacts, a lot of this new mass gets put on display in museums. What exactly is the OP so interested in, just figuring out the rate of growth?

If the issue here is that the OP thinks continental drift implies growth then no -- nothing on Earth "grows" anyway, it re-arranges. "Growth" requires new mass from outside. As far as the universe as a whole, not one speck of new matter has been created since the big bang.
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Re: Is earth growing?

Unread postby Sixstrings » Sat 20 Aug 2011, 05:22:46

Some perspective on sizes, planets and stars:

Image

Now here's what I'm not clear about. As far as I know there's an upper limit to how big a solid planet can get before it starts looking like a gas giant:

Image
Image

See, that solid rocky core is about the size of Earth. I didn't know this before, but looks like the majority of Jupiter is actually "metallic hydrogen" (the gray part). Pretty cool, I wonder what that looks like. :?:

As far as I know, if a gas giant gets big enough then it ignites into a star:

$this->bbcode_second_pass_quote('', '[')b]The process of further shrinkage with increasing mass would continue until appreciable stellar ignition is achieved as in high-mass brown dwarfs around 50 Jupiter masses.[26] This has led some astronomers to term it a "failed star", although it is unclear whether the processes involved in the formation of planets like Jupiter are similar to the processes involved in the formation of multiple star systems.

Although Jupiter would need to be about 75 times as massive to fuse hydrogen and become a star, the smallest red dwarf is only about 30 percent larger in radius than Jupiter.[27][28] Despite this, Jupiter still radiates more heat than it receives from the Sun; the amount of heat produced inside the planet is similar to the total solar radiation it receives.[29] This additional heat radiation is generated by the Kelvin–Helmholtz mechanism through adiabatic contraction.
http://en.wikipedia.org/wiki/Jupiter
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Re: Is earth growing?

Unread postby JohnRM » Sat 20 Aug 2011, 07:33:50

$this->bbcode_second_pass_quote('steam_cannon', '')$this->bbcode_second_pass_quote('JohnRM', '.')..if the Earth were half its diameter 65 million years ago, it would have to have grown only 1/3 of a foot (10 cm) per year, since then. That is not at all unreasonable to believe...
Yes it is unreasonable to believe that since there is no evidence to support what you're saying. The mass from meteors raining down on the earth is hardly significant compared to the earths mass and there is no evidence to support 10cm per year of debris depositing on the earth. What you are saying is the very definition of unreasonable.



$this->bbcode_second_pass_quote('diemos', '')$this->bbcode_second_pass_quote('JohnRM', 'G')iven Mr. Adams claims, if the Earth were half its diameter 65 million years ago, it would have to have grown only 1/3 of a foot (10 cm) per year, since then.


Oy.

Does it never occur to anyone to walk outside, look at the ground, and say, "Hmmm. It doesn't appear that the ground has added an extra 3 foot think layer of asteroids since the year 2001 so this "theory" is probably crap."



I am talking about the total amount averaged over 65 million years. If we had just two or three years where a huge meteor, miles in diameter, it would add up. But, I think one major point got lost in all of this. The idea is reasonable to explore and for people to believe. Of course, once you go into the science of it and do the math, it may be proven wrong, but it is reasonable for the average person to believe.
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Re: Is earth growing?

Unread postby vision-master » Sat 20 Aug 2011, 08:47:06

Sixstrings also believes in evolution. Too bad, what really is happing is devolution with our species. Sixstrings is your classic in-the-box thinker. 8)
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Re: Is earth growing?

Unread postby diemos » Sat 20 Aug 2011, 10:38:51

$this->bbcode_second_pass_quote('sureshbansal342', '
') first let me introduce myself as a independent scientist researching on earth formation .


No doubt a distinguished fellow of the University of Mom and Dad's basement.
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Re: Is earth growing?

Unread postby diemos » Sat 20 Aug 2011, 10:43:49

$this->bbcode_second_pass_quote('JohnRM', 'O')f course, once you go into the science of it and do the math, it may be proven wrong, but it is reasonable for the average person to believe.


What a fascinating statement on so many levels. Since the average person has no idea how anything works and thinks everything is just different flavors of magic it is reasonable for the average person to believe anything they want. Science and math represent our best understanding of how the universe works so, yes, once you bring that into the picture the set of things that can be believed becomes greatly reduced.
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Re: Is earth growing?

Unread postby bjarneorn » Sat 20 Aug 2011, 14:58:53

I must say I find this discussion pathetic, as well as funny. Especially when I read people denying expansion, at the same time as they claim knowledge in physics.

GPS satellites, have an error at about 1 meter. Even the military one, have an error around that, or the best references at around 1 dm, or about 10 centimeters. This is the very best, and here comes NASA and claims, earth grows at 0,1mm per year. Mr. Wu says "well within current measurements uncertaintees". Most certainly is, because there is nothing we have to calculate it to such accuracy. So, what NASA has actually done, is confirm that Earth is in fact, growing. And using most concervative methods, they could find ... they came down to, no more than 0,1 mm per year, or about 8% growth. This with an error margin around 1dm, or 10 cm at least ... practically validating Earth Expansion, even to the radical Neal Adams.

To those who claim the know Physics, here is a little headache. Earth can grow, without ANY additional matter whatsoever. Why? Because inside the earth is liquified plasma, and metallic plasma. The liquified plasma is magnetic, and referred to as magma. The plasmatic material, will seek it's gaseous state as it cools ... yes, gaseous state. And to understand what is happening with this plasma, when it is combined with minerals. You can make a bread dough, with yeast inside and watch the wet dough increase as gas bubbles are built within it. As you put it in the oven, and bake it ... gas bubbles will continue to create, and the "crust" of the bread, that is outside ... will rip, and break. Very similar to the earths crust.

And here is another headache, gravity on the surface can change without any additional matter whatsover. Because surface gravity, depends on radius to the core and not the mass of rock on the earth. You can verify this, by walking on top of a mountain. On the top, gravity is less ... even if you have more rock under your feet, because you are further away from the liquified and metallic plasma beneath you. You can also view volcanic activity underneath, by viewing gravitational changes. Gravity will increase, as magma moves underneath you ... and the earth will rise, and mountains swell, literally as well. They will shrink, and gravity will decrease noticably. This is very notisable change, that proves beyond doubt, that it is the plasma inside the earth that constitutes for the gravity of the earth ... not the granite you stand on.

So, anyones bright idea, that earth cannot grow without added material is bogus. Anyone with half a wit, who peeks out there into the universe will notice planets and stars in all sizes. Did God create them like that, with a fixed size and material ... or did they grow from one single entity, just like life grew from one single organism.

I think the worst thing that has ever happened to science, is the amount of illogical, religious freaks that spend all their time, searching for the "God element". Or what did they call them in "Star Wars" movies? Mito clonitos or something like that?

And for all of you Physics experts ... Plate Tectonics is a perpetual machine. Now, I can understand a theologist wanting the earth to be a perpetual machine, made by God himself. But anyone with a scientific and scrutinous mind, should dismiss this idiocy by hand. It basically says, that the same force that breaks through the earth ... is pushing it back in ... and in any physics, that is BS.
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Re: Is earth growing?

Unread postby JohnRM » Sat 20 Aug 2011, 16:07:17

$this->bbcode_second_pass_quote('diemos', '')$this->bbcode_second_pass_quote('JohnRM', 'O')f course, once you go into the science of it and do the math, it may be proven wrong, but it is reasonable for the average person to believe.


What a fascinating statement on so many levels. Since the average person has no idea how anything works and thinks everything is just different flavors of magic it is reasonable for the average person to believe anything they want. Science and math represent our best understanding of how the universe works so, yes, once you bring that into the picture the set of things that can be believed becomes greatly reduced.


People who don't know better. Stop being intentionally obtuse.
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Re: Is earth growing?

Unread postby Sixstrings » Sat 20 Aug 2011, 17:06:00

I googled this a bit. Basically the "expanding earth" stuff is Youtuber crackpottery. Seems to be Australians who are pushing this. You know what.. moon landing denial is big down there too. They're odd birds, those Aussies. ;) :lol:

From Wiki:

$this->bbcode_second_pass_quote('', 'S')cientific consensus

Generally, the scientific community finds no evidence to support the expansion of the Earth theory, and uses the following arguments to dismiss it:

Measurements with modern high-precision geodetic techniques show that the Earth is not currently increasing in size to within a measurement accuracy of 0.2 mm·y−1.[13] Furthermore, the motions of tectonic plates and subduction zones measured by a large range of geological, geodetic and geophysical techniques supports plate tectonics.[14][15][16]

Mass accretion on a scale required to change the Earth's radius is contradicted by the current accretion rate of the Earth, and by the Earth's average internal temperature: any accretion releases a lot of energy, which would warm the planet's interior. Expanding Earth models based on thermal expansion contradict most modern principles from rheology, and fail to provide an acceptable explanation for the proposed melting and phase transitions.

Paleomagnetic data has been used to calculate that the radius of the Earth 400 million years ago was 102 ± 2.8% of today's radius.[17][18]
Examinations of data from the Paleozoic and Earth's moment of inertia suggest that there has been no significant change of earth's radius in the last 620 million years.[19]
http://en.wikipedia.org/wiki/Expanding_earth


The part I bolded, that's what I've already said in this thread. I'm not a scientist but common sense tells me there aren't enough meteor impacts to add enough mass to change Earth's radius. And as I've said, we're long past the high impact growth stage anyhow.

I guess you guys are saying the Earth is *expanding*, not adding mass. That would require the inner layers to somehow become less dense.. anyhow there's no evidence Earth expanded in the last 620 million years. The planet is 4 billion years old now.. seems like a stable planet to me.
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Re: Is earth growing?

Unread postby vision-master » Sat 20 Aug 2011, 17:47:07

Where did the water come from 6?
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Re: Is earth growing?

Unread postby rockdoc123 » Sat 20 Aug 2011, 18:16:36

$this->bbcode_second_pass_quote('', 'u')t anyone with a scientific and scrutinous mind, should dismiss this idiocy by hand. It basically says, that the same force that breaks through the earth ... is pushing it back in ... and in any physics, that is BS.


atoundingly stupid. Oceanic crust is created at mid ocean rises. Oceanic plates move through gravitational force away from the spreading centres. We know this to be true because of magnetic striping in the crust as a consequence of plate reversals. These can be matched and dated on each side of the spreading centre giving us a clear picture of spreading velocities and trajectories. The plates are then subducted through gravitational forces along oceanic trenches. We know the plates are subducted due to the Benioff zone of earthquakes which are well documented and illustrate the down-going slab. As the oceanic crust is subducted it melts and is redistributed partly in the asthenosphere and lower crust and partly brought back to surface through back arc volcanoes (the ring of fire). Frictional forces created between continental or transitional crust and the down-going slab create thrust faults commonly found in acretion wedges. Collision of plates results in mountain building and thickening of continental crust.

This is a very well researched field of geology and has been for some fifty years.
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Re: Is earth growing?

Unread postby Sixstrings » Sat 20 Aug 2011, 18:18:03

$this->bbcode_second_pass_quote('vision-master', 'W')here did the water come from 6?


I think it was comets.

Europa has a lot of water too:

Image
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Re: Is earth growing?

Unread postby vision-master » Sat 20 Aug 2011, 18:32:47

What if the Earth's core is Plasma?
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Re: Is earth growing?

Unread postby dolanbaker » Sat 20 Aug 2011, 18:35:34

$this->bbcode_second_pass_quote('vision-master', 'W')hat if the Earth's core is Plasma?


It would be a fecking great screen to watch the footie on! :badgrin:
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Re: Is earth growing?

Unread postby vision-master » Sat 20 Aug 2011, 18:37:58

an you are an boob-tube. :lol:
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Re: Is earth growing?

Unread postby dolanbaker » Sat 20 Aug 2011, 18:42:40

$this->bbcode_second_pass_quote('vision-master', 'a')n you are an boob-tube. :lol:

'twas a typo... but a good one ;)
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Re: Is earth growing?

Unread postby Sixstrings » Sat 20 Aug 2011, 18:51:10

$this->bbcode_second_pass_quote('vision-master', 'W')hat if the Earth's core is Plasma?


EDIT: snarky reply deleted, the topic is more complex than I thought.

Did some reading on a science forum, plasma core was debunked but it's complex. I guess this isn't exactly settled science. Still more to learn about the core.

Does the inner core grow?

$this->bbcode_second_pass_quote('', '[')b]Growth of the inner core is thought to play an important role in the generation of Earth's magnetic field by dynamo action in the liquid outer core. This occurs mostly because it cannot dissolve the same amount of light elements as the outer core and therefore freezing at the inner core boundary produces a residual liquid that contains more light elements than the overlying liquid.
http://en.wikipedia.org/wiki/Inner_core


My layman's understanding was that the core is solid iron nickel alloy, and that has something to do with why we have a magnetosphere -- critical to life on earth.
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Re: Is earth growing?

Unread postby vision-master » Sat 20 Aug 2011, 19:37:28

Problem is, it's all just theory, no one has drilled taht far an brougt up a sample.... lsol :lol:
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Re: Is earth growing?

Unread postby Sys1 » Sat 20 Aug 2011, 23:28:54

The Earth is not growing, but this thread troll does.
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