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why does Earth and Io have magma?



 
 
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  #1  
Old July 19th 07, 06:04 PM posted to sci.astro
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Posts: 7
Default why does Earth and Io have magma?

Both spin at high speeds with a moon or are a moon creating magma.
Venus does have volcanoes but they are all extinct.

Jon Riley
Toronto

  #2  
Old July 19th 07, 08:13 PM posted to sci.astro
Androcles[_2_]
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Posts: 1,040
Default why does Earth and Io have magma?


wrote in message
ups.com...
: Both spin at high speeds with a moon or are a moon creating magma.
: Venus does have volcanoes but they are all extinct.
:
: Jon Riley
: Toronto

How peculiar. Earth has volcanoes but they are all extinct too, when seen
from Venus.



  #3  
Old July 19th 07, 10:25 PM posted to sci.astro
Landy
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Posts: 124
Default why does Earth and Io have magma?


wrote in message
ups.com...
Both spin at high speeds with a moon or are a moon creating magma.
Venus does have volcanoes but they are all extinct.

Jon Riley
Toronto


The moon causes Earth magmatism? Well that's a new one!
cheers
Bill


  #4  
Old July 20th 07, 01:20 AM posted to sci.astro
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Posts: 3
Default why does Earth and Io have magma?



The moon causes Earth magmatism? Well that's a new one!
cheers
Bill


Yes the moon does cause Earth's magmatism! As the moon rotates the
surface of Earth, the surface bends which creates magma.

  #5  
Old July 20th 07, 09:28 AM posted to sci.astro
Landy
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Posts: 124
Default why does Earth and Io have magma?


wrote in message
ps.com...


The moon causes Earth magmatism? Well that's a new one!
cheers
Bill


Yes the moon does cause Earth's magmatism! As the moon rotates the
surface of Earth, the surface bends which creates magma.


What a load of absolute ********.
cheers
Bill


  #6  
Old July 20th 07, 09:37 AM posted to sci.astro
The Chief Instigator[_2_]
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Posts: 21
Default why does Earth and Io have magma?

"Landy" writes:

wrote in message
ups.com...


The moon causes Earth magmatism? Well that's a new one!
cheers
Bill


Yes the moon does cause Earth's magmatism! As the moon rotates the
surface of Earth, the surface bends which creates magma.


What a load of absolute ********.
cheers
Bill


I wonder why he hasn't claimed that it can be found on Jupiter, Saturn, and
Mars, all of which rotate with a speed similar to (or quite a bit faster than)
the rock we're sitting on...

--
Patrick "The Chief Instigator" Humphrey ) Houston, Texas
chiefinstigator.us.tt/aeros.php (TCI's 2006-07 Houston Aeros) AA#2273
LAST GAME: San Antonio 4, Houston 2 (April 15)
NEXT GAME: October 2007, date/place/opponent TBA
  #7  
Old July 20th 07, 11:51 AM posted to sci.astro
Androcles[_2_]
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Posts: 1,040
Default why does Earth and Io have magma?


"The Chief Instigator" wrote in message
...
: "Landy" writes:
:
: wrote in message
: ups.com...
:
: The moon causes Earth magmatism? Well that's a new one!
: cheers
: Bill
:
: Yes the moon does cause Earth's magmatism! As the moon rotates the
: surface of Earth, the surface bends which creates magma.
:
: What a load of absolute ********.
: cheers
: Bill
:
: I wonder why he hasn't claimed that it can be found on Jupiter, Saturn,
and
: Mars, all of which rotate with a speed similar to (or quite a bit faster
than)
: the rock we're sitting on...

Jupiter and Saturn are gas giants, Mars has two very small moons.
If you don't know what effect our Moon has on Earth spend a
day in the Bay of Fundy or the Bristol Channel and watch the
tides. The same force that makes water rise and fall in our oceans
also acts on the lithosphere, and a jacuzzi full weighs a ton.
The total prat "Bill" is a load of absolutely useless ignorant
******** and you are just another sucker taken in by the troll.
Cheers,
Androcles





  #8  
Old July 20th 07, 03:04 PM posted to sci.astro
Peter Webb[_2_]
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Posts: 927
Default why does Earth and Io have magma?


"Androcles" wrote in message
...

"The Chief Instigator" wrote in message
...
: "Landy" writes:
:
: wrote in message
: ups.com...
:
: The moon causes Earth magmatism? Well that's a new one!
: cheers
: Bill
:
: Yes the moon does cause Earth's magmatism! As the moon rotates the
: surface of Earth, the surface bends which creates magma.
:
: What a load of absolute ********.
: cheers
: Bill
:
: I wonder why he hasn't claimed that it can be found on Jupiter, Saturn,
and
: Mars, all of which rotate with a speed similar to (or quite a bit faster
than)
: the rock we're sitting on...

Jupiter and Saturn are gas giants, Mars has two very small moons.
If you don't know what effect our Moon has on Earth spend a
day in the Bay of Fundy or the Bristol Channel and watch the
tides. The same force that makes water rise and fall in our oceans
also acts on the lithosphere, and a jacuzzi full weighs a ton.
The total prat "Bill" is a load of absolutely useless ignorant
******** and you are just another sucker taken in by the troll.
Cheers,
Androcles


Well, I'm still confused.

The claim appears to be that the Moon's tidal forces heat the earth, which
causes the magma to heat up and increase volcanism.

Firstly, it would appear very plausible to say that the deformation caused
by tidal forces increases vulcanism, by repeatedly opening and closing
cracks through which lava can erupt. I have no idea if this is true or not,
but its certainly plausible.

However, this is not the claim - its the heating caused by tidal forces.
This seems unlikely, but is a very good question. The heating is equal to
the total loss of kinetic and potential energy in the earth moon system. The
moon is retreating at 3cms a year, and its pretty big, so this is some
energy at least. How much - any idea? And where does it go - mostly to
heating the earth, or mostly to heating the moon? I would assume that the
component going to the earth would overwhelmingly be "dumped" into the
oceans, as this is where tidal friction occurs. This is a far smaller "pool"
to dump the energy in than is the entire earth, so the heating effect may be
non-trivial. Does anybody have any idea what happens to that energy, and how
much of it there is?

(Although I doubt its enough to create magma).


  #9  
Old July 20th 07, 04:50 PM posted to sci.astro
Androcles[_2_]
external usenet poster
 
Posts: 1,040
Default why does Earth and Io have magma?


"Peter Webb" wrote in message
u...
:
: "Androcles" wrote in message
: ...
:
: "The Chief Instigator" wrote in message
: ...
: : "Landy" writes:
: :
: : wrote in message
: : ups.com...
: :
: : The moon causes Earth magmatism? Well that's a new one!
: : cheers
: : Bill
: :
: : Yes the moon does cause Earth's magmatism! As the moon rotates the
: : surface of Earth, the surface bends which creates magma.
: :
: : What a load of absolute ********.
: : cheers
: : Bill
: :
: : I wonder why he hasn't claimed that it can be found on Jupiter,
Saturn,
: and
: : Mars, all of which rotate with a speed similar to (or quite a bit
faster
: than)
: : the rock we're sitting on...
:
: Jupiter and Saturn are gas giants, Mars has two very small moons.
: If you don't know what effect our Moon has on Earth spend a
: day in the Bay of Fundy or the Bristol Channel and watch the
: tides. The same force that makes water rise and fall in our oceans
: also acts on the lithosphere, and a jacuzzi full weighs a ton.
: The total prat "Bill" is a load of absolutely useless ignorant
: ******** and you are just another sucker taken in by the troll.
: Cheers,
: Androcles
:
:
: Well, I'm still confused.
:
: The claim appears to be that the Moon's tidal forces heat the earth, which
: causes the magma to heat up and increase volcanism.
:
: Firstly, it would appear very plausible to say that the deformation caused
: by tidal forces increases vulcanism, by repeatedly opening and closing
: cracks through which lava can erupt. I have no idea if this is true or
not,
: but its certainly plausible.
:
: However, this is not the claim - its the heating caused by tidal forces.
: This seems unlikely, but is a very good question. The heating is equal to
: the total loss of kinetic and potential energy in the earth moon system.
The
: moon is retreating at 3cms a year, and its pretty big, so this is some
: energy at least. How much - any idea? And where does it go - mostly to
: heating the earth, or mostly to heating the moon?

The Moon keeps one face toward the Earth. That is not a coincidence.
Tides acting on the Moon by Earth barely exist, Luna is no longer
heated, but eons ago its axial rotation would not have been synchronous
with it's orbit as it is today. That would be too much of a concidence.
As a result the Moon shows both impact craters *and* the results
of vulcanism, just as Earth does. In other words Luna lost (or gained)
its present angular velocity as a direct result of frictional movement
within itself caused by tidal forces. I'm not going to put numbers
on it, I'll just say "astronomical".
As to the orbit itself, you may have noticed that comets approach
the sun in highly elliptical orbits whereas the planets have nearly
circular paths. This series of photographs made into a gif clearly
shows the Moon has a slightly elliptical orbit (which of course
astronomers are fully aware of, but the demonstration is
easier than staring at lists of numbers) and as you'll see, we can
observe more than 180 degrees of the moon's surface from
east and west limbs as well as it approaching and receding.
http://antwrp.gsfc.nasa.gov/apod/ap051113.html

Anyway, the most stable orbit is a circular one and the least
tidal effect is when one body faces the other.

However, that is not the full story, the Sun is causing tides
on both the Earth (spring when the Sun and Moon act in unison
and neap tides) and the Moon, so the Moon has two significant
bodies acting upon it, Earth predominating because of its proximity.
Just how that will affect the Moon's orbit in the future cannot be
predicted since it is chaotic, but you can get a feel for it from this:
http://faculty.ifmo.ru/butikov/Projects/Collection.html

: I would assume that the
: component going to the earth would overwhelmingly be "dumped" into the
: oceans, as this is where tidal friction occurs. This is a far smaller
"pool"
: to dump the energy in than is the entire earth, so the heating effect may
be
: non-trivial. Does anybody have any idea what happens to that energy, and
how
: much of it there is?
:
: (Although I doubt its enough to create magma).

But it IS enough to create magma. That puddle of water floating
on the crust that we call 'ocean' has much less friction than the
moving rock beneath it. Keep in mind that the lithosphere
forms an insulating blanket to keep the heat in and the tides are
twice a day, pumping colossal amounts of energy in.
A magma eruption will break through at the weakest point in
the crust which is thinnest along the mid-Atlantic ridge and around
the Pacific rim, the heat will be convected away by water and/or air
and then radiate into space on the night side.
If our planet did not radiate the same heat it receives then its
temperature would climb. There has been life on Earth for billions
of years, it is known to have been at a stable temperature all that
time because life is very heat sensitive.
Little grows in Antarctica or the Sahara and that is a very small
difference in temperature indeed, nothing like magma temperatures.
It only seems large to us because we are so sensitive to small
changes, having to maintain our blood heat to 98.4 F precisely
or we fail to function correctly. The first thing you'll do when cold
is to seek warmth and when warm seek air conditioning, and you'll
do that before you eat. You die within hours naked in a snow storm
and people keel over when it's too warm. Insulation and shelter
are key to survival; the lithosphere insulates us from the magma,
and when the magma breaks through we have earthquakes and
vulcanism.
Gravity is a pretty powerful force, just put some cookie crumbs
in your nice soft bed and see how uncomfortable it can make
you feel.


  #10  
Old July 21st 07, 01:00 AM posted to sci.astro
Landy
external usenet poster
 
Posts: 124
Default why does Earth and Io have magma?


"Androcles" wrote in message
...

"The Chief Instigator" wrote in message
...
: "Landy" writes:
:
: wrote in message
: ups.com...
:
: The moon causes Earth magmatism? Well that's a new one!
: cheers
: Bill
:
: Yes the moon does cause Earth's magmatism! As the moon rotates the
: surface of Earth, the surface bends which creates magma.
:
: What a load of absolute ********.
: cheers
: Bill
:
: I wonder why he hasn't claimed that it can be found on Jupiter, Saturn,
and
: Mars, all of which rotate with a speed similar to (or quite a bit faster
than)
: the rock we're sitting on...

Jupiter and Saturn are gas giants, Mars has two very small moons.
If you don't know what effect our Moon has on Earth spend a
day in the Bay of Fundy or the Bristol Channel and watch the
tides. The same force that makes water rise and fall in our oceans
also acts on the lithosphere, and a jacuzzi full weighs a ton.
The total prat "Bill" is a load of absolutely useless ignorant
******** and you are just another sucker taken in by the troll.
Cheers,
Androcles


G'day again Androcles ****wit,
For your edification, the earthtides cuased by the moon are several orders
of magnitude
less than that exerted on Io by Jupiter. Just in case you weren't aware,
jupiter is significantly
larger than the moon. But then there's no point in me telling you that -
you'd want me to present
the evidence for this "assertion". FOAD
cheers
Bill


 




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