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Two points here: rocks are solidified material--early Earth was molten. The first rocks appeared after the molten Earth cooled somewhat. Secondly, Earth's rocks are constantly being recycled through the 'rock cycle'. The oldest rocks on Earth have somehow survived those recycling efforts, but no rock found on Earth (other than some meteorites) is as old as the planet.
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What evidence supports the hypothesis that Earth is 4.6 billion years?
Among other things, rocks have been found that are over 4 billion years old. The age of such rocks is determined by radioactive dating. Note that this is not "a" method, but perhaps 40 different methods (depending on the isotopes involved), which complement one another.The exact age of the Earth is harder to determine exactly; but basically, it must be at least as old as the oldest rocks found.
What is the current age of the earth?
The earth is roughly 4.5 billion years old. We know this to be the case because we have dated rocks from the moon that old, and earth must be at least as old as our moon.
Can the earth have the same density in the center as it does on the surface?
No it can not. We know this because we know the mass of the whole Earth (by looking at its gravity) and if the whole Earth were made of rocks of the same density as we see at the surface, there would not be enough mass to account for the gravity. The Earth must have more dense stuff in its core.
Rocks buried deep underground must do what before they are weathered or eroded?
Rocks buried deep underground must get exposed before they are weathered or eroded
What evidence did Darwin observe that led him to believe that Earth was older than 6000 years?
Darwin found fossils that were similar but not the same as living species.Living species might have some relationship to the fossil form. In order for such changes to occur, Darwin figured that earth must be much older than 6000 years.
What evidence supports the hypothesis that Earth is 4.6 billion years?
Among other things, rocks have been found that are over 4 billion years old. The age of such rocks is determined by radioactive dating. Note that this is not "a" method, but perhaps 40 different methods (depending on the isotopes involved), which complement one another.The exact age of the Earth is harder to determine exactly; but basically, it must be at least as old as the oldest rocks found.
What is the law of superpositon?
The rocks below must be older, otherwise the rocks on top couldn't have formed above it without falling to its position. Therefore, it must be older for it t to have been there when the above layers (younger) where forming.
Why are there things that are orbiting around the earth?
must be rocks but i luv one direction
How do you figure out how old rocks are by using their positions compared to each other?
With sedimentary rocks, young ones are usually on top of older ones. Where igneous rocks intrude into others, the intrusions must be younger than the surrounding rocks.
What is the current age of the earth?
The earth is roughly 4.5 billion years old. We know this to be the case because we have dated rocks from the moon that old, and earth must be at least as old as our moon.
Who said that earth must be far older then most people believed?
Charles Lyell's ' Principles of Geology. '
What did the rovers find on mars?
The Martian rovers discovered that the geology is base on sulphate rocks and not carbonate rocks as seen on Earth. The atmosphere is a reducing one rather than an oxidising one as here on Earth and accounts for the orange hue to all the rocks. Water must have flowed in vast quantities in the past but where it is now is still unknown. It may have leaked into space or it may be frozen as super brine beneath the surface.
Why did hutton reason that the earth is very old?
As Hutton made observations about the rocks in the area where he lived, he began to find clues that most changes on earth happen slowly, and that earth must therefore be very old.
Why did James hutton reason that the earth is very old?
As Hutton made observations about the rocks in the area where he lived, he began to find clues that most changes on earth happen slowly, and that earth must therefore be very old.
Which earth scientist is most likely to study volcanoes?
A geologist of course, they study rocks, and land formations. and as you must know volcanos are a land formation
What is the worlds oldest thing?
The Earth itself is the oldest thing on Earth.
Why are must fossils in sedimentary rocks?
NO
