The burning of fossil fuels will release into the carbon-oxygen cycle. nitrogen soot oxygen carbon

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.