Which isotope is appropriate for dating rocks that are billions of years old? oxygen-16

carbon-12

uranium-238

carbon-14

uranium-238

Explanation:

Uranium-238.

Uranium - 238' s half lif time is 4.5 billion years. This isotope decays until the stable isotope  Lead - 206.

It has been used to date the oldest rocks of the earth with a resulting age of approximately 4.0 billion years old.

when atmosphere interacts with biosphere they focuses on on the sources and sinks of green house gases (ghgs) air pollutants, particular matters, water and energy between the earth's surface and the atmosphere. the biosphere affects the climate. the atmosphere and biosphere are in constant interaction with each other, and all living things rely on gases in the atmosphere for life. organisms such as animals take in oxygen gas form the atmosphere to use in every cell of their body for smooth functioning of daily routine exercises.

a c d and f

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