7. which of the following is least likely to be studied using the sedimentary rock record?
o a. past plate movements based on similar fossils on different continents
o b. cooling history of an intrusive magma body
o c. identifying potential extinction events in the fossil record
o d. identifying past depositional systems—such as marine settings, rivers, and valleys-from the bedrock

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.