Subhan Allah I was about to write it because it was worrying me that I couldn't find an explanation for it, although it made sense on the outside using just common sense.
I'm not sure about that first part. The compressibility of water is negligible and so the volume won't actually decrease. The depression in the balloon is possible because the balloon is stretchy so the water can be pushed elsewhere. I get that its an analogy, but its important to realize that water does not react according to Boyle's Law P ~ 1/V. Good description of isostasy, but a misleading analogy to explain it.
Nice feedback. Yeah, the water balloon is by no means an accurate model or reproduction of isostasy on a smaller scale, rather a simple representation of what is observed. Rather unscientific, but as long as one doesn't assume real isostatic adjustment is actually that simple, I thought it worked for the sake of the video.
People are saying the balloon isn’t a valid analogy because it’s stretchy however if we know anything about isostasy we know that it is a very slow process. Folding, faulting , fracturing and other structural geomorphologic processes are not present here. They are present with orogenic means because mountain building is caused by catastrophism or other sudden, violent tectonic events. The lithosphere simply cannot handle a sudden entrance of that much energy into a system. The Isostatic rebound we see here is possible because of very slow adjustments in equilibrium. We could not have rebound because the lithosphere would deform indefinitely via fracture. The balloon represents a stretching lithosphere and though the lithosphere is rigid it will not fracture because of a slower entrance of energy. Epeirogeny is one of the main geomorphic processes that is a result of isostasy. Where orogeny and epeirogeny both can build mountains, they use two completely different methods in terms of the deformation caused in the lithosphere. Isostatic rebound would not be possible if the the lithosphere did not warp in some way.
Don't really understand why you said the volume would be decreased in this situation. Unless you pressed the balloon enough for water to come out, there is no decrease in volume.
Thanks for the great explanation. This brings up the question: why is the crust solid and the mantle liquid. The simple answer is that the crust has cooled because it was able to expel its heat into space in the form of electromagnetic radiation. But what determines the thickness of that crust!? I guess it’s ultimately a question of how much heat there is left in the earth (including the heat of fission), and how much heat comes in from the sun, how much radiates away and so forth. But I’d imagine the lithosphere dipping down like that gets slowly eaten away by the presumably hotter magma it is exposed to. I guess it takes a long time, though.
If the earth's crust is pushed down in one location, doesn't it rise in other locations? In the case of polar ice melt water adding weight to ocean water, as land under the ice rises, do all continental land masses rise as well?
A shifting of mass does not equate to the adding of weight. With enough pressure land masses would rise. I’m wondering, if two giant asteroids slam into opposite sides of the Earth at immense speed would the ice at the North Pole be bounced out of the atmosphere because the bounciness and flexibility of the Earth?
@@user-ur2mr7dj6h No because the Earth is too big for a small force like an asteroid to cause that. And also the asthenosphere, although it flows(and very slowly too), is solid, which means high density and that equals greater upthrust. So if a large asteroid hits earth, most of the damage would be on the crust.
explanation starts at 4:45. Helped a lot.
Simpler than simplest explaination of Isostasy, have ever seen.
Thank you so much!
Perfectly explained. Been struggling to understand the concept for the past two days. Now I got it.
When my teacher explained this I had a hard time following it, but your explanation was very clear! Thanks!
"He has placed into the earth firm mountains, so it does not shake with you, as well as rivers, and pathways so you may find your way. "
Asalamualaikum
Yes our God ALLAH said
Science is proving it now or 4 5 centuries ago
How about volcano
Subhan Allah I was about to write it because it was worrying me that I couldn't find an explanation for it, although it made sense on the outside using just common sense.
@@hasnainprsnl74 Do you believe in flat earth too? Genuinely curious
@@rushiljain9423 why would he? the Quran doesn't explicitly say that it's flat.
the most simplistic and understandable vid, great work. thank you x
It's really helpful with the analogy you made. Thank you!
I'm not sure about that first part. The compressibility of water is negligible and so the volume won't actually decrease. The depression in the balloon is possible because the balloon is stretchy so the water can be pushed elsewhere. I get that its an analogy, but its important to realize that water does not react according to Boyle's Law P ~ 1/V. Good description of isostasy, but a misleading analogy to explain it.
Nice feedback. Yeah, the water balloon is by no means an accurate model or reproduction of isostasy on a smaller scale, rather a simple representation of what is observed. Rather unscientific, but as long as one doesn't assume real isostatic adjustment is actually that simple, I thought it worked for the sake of the video.
Well how compressible is magma compared to water? Maybe the mountains cause pressure elsewhere, like the water balloon.
Brilliant explanation
People are saying the balloon isn’t a valid analogy because it’s stretchy however if we know anything about isostasy we know that it is a very slow process. Folding, faulting , fracturing and other structural geomorphologic processes are not present here. They are present with orogenic means because mountain building is caused by catastrophism or other sudden, violent tectonic events. The lithosphere simply cannot handle a sudden entrance of that much energy into a system. The Isostatic rebound we see here is possible because of very slow adjustments in equilibrium. We could not have rebound because the lithosphere would deform indefinitely via fracture. The balloon represents a stretching lithosphere and though the lithosphere is rigid it will not fracture because of a slower entrance of energy. Epeirogeny is one of the main geomorphic processes that is a result of isostasy. Where orogeny and epeirogeny both can build mountains, they use two completely different methods in terms of the deformation caused in the lithosphere. Isostatic rebound would not be possible if the the lithosphere did not warp in some way.
Don't really understand why you said the volume would be decreased in this situation. Unless you pressed the balloon enough for water to come out, there is no decrease in volume.
Thanks for the great explanation. This brings up the question: why is the crust solid and the mantle liquid. The simple answer is that the crust has cooled because it was able to expel its heat into space in the form of electromagnetic radiation.
But what determines the thickness of that crust!? I guess it’s ultimately a question of how much heat there is left in the earth (including the heat of fission), and how much heat comes in from the sun, how much radiates away and so forth.
But I’d imagine the lithosphere dipping down like that gets slowly eaten away by the presumably hotter magma it is exposed to. I guess it takes a long time, though.
The balloon is filled with water. The volume does not decrease. You deform one point, other points deform to allow this action.
Great video!
Man this channel is underrated...
Why is the intro Pokémon Mystery Dungeon music lol
If the earth's crust is pushed down in one location, doesn't it rise in other locations? In the case of polar ice melt water adding weight to ocean water, as land under the ice rises, do all continental land masses rise as well?
The lithosphere moves downwards and the asthenosphere compresses... at least that´s what I understod.
A shifting of mass does not equate to the adding of weight. With enough pressure land masses would rise. I’m wondering, if two giant asteroids slam into opposite sides of the Earth at immense speed would the ice at the North Pole be bounced out of the atmosphere because the bounciness and flexibility of the Earth?
@@user-ur2mr7dj6h
No because the Earth is too big for a small force like an asteroid to cause that. And also the asthenosphere, although it flows(and very slowly too), is solid, which means high density and that equals greater upthrust. So if a large asteroid hits earth, most of the damage would be on the crust.
helped a ton!
I love you. !!! YOU ARE A LIFESAVER
Thanks. Although not much detailed but i got the basic idea.
Very helpful. Thanks!
thanks for the video
Very informative...#GeoEntire
Thank you!
Great thank you so much
nice video
👍🏻👍🏻👍🏻
U saved me ❤️
Thanksss
good job
The cat is the instructor !
nice
Rellyhelpfull
This analogy is wrong, a liquid cannot be compressed, so there is no "denser" water
☁☁☁☁
You took 7.5 minutes to teach this 😂 lol
ncy
bro yaps so much without getting to the point
agar hindi me samjhte to aacha hota..
Digital cinema re chutiya.... Ye angrez hai, hindi Mein ghanta samjhata chutiya kahin ka
😀😀
No such thing as plate tectonics or isostasy. But thanks for playing science. #TerraformingofTerra
Thank you!