Which statement describes the law of superposition when used to find the relative age of fossils in rocks? -Fossils inside a layer of a rock are older than the surrounding rock.
-Fossils in bottom layers are older than fossils in top layers.
-Fossils were formed during a time when chemical processes operated differently.
-Fossils of the same organism found at different locations formed in similar climates.

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explanation:

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it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.