Which term best describes the circulation of air and water in the atmosphere? O A. condensation
B. evaporation
O
C. convection
OD. sublimation

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

3-isopentane; 3-methylbutane, and 1,2-methylpropane do not meet iupac rules, so they are wrong names.the only valid name onthe list is 2-methylbutane, which is the same isopentane.this is its formula:                   ch2                    |ch3 - ch - ch2 - ch3answer: 2-methylbutane

Definitely 25.3 degrees celsius 

Answerwhenever an organism dies, decomposers break down the corpse into nitrogen in the form of ammonia. this nitrogen can then be used again by nutrifying bacteria to fix nitrogen for the plants i believe this answer to be correct, plz check good luck