Please answer asap due brainlest science Which knowledge is radiometric dating based upon?

the weight of the samples

the name of the rocks

the rate of decay for certain isotopes

the sequence of layers in the rocks

Which term names the longest geologic time frame?

epoch

eon

era

period

Studies of sedimentary rocks and fossils have helped scientists understand the history of Earth.

How is geologic time organized on the geologic time scale?

millennia and then smaller periods based on geologic and biologic events that occurred during those times

eras and then smaller periods based on geologic and biologic events that occurred during those times

eras and then smaller millennia based on geologic and biologic events that occurred during those times

periods and then smaller eras based on geologic and biologic events that occurred during those times