How would you define
science?

Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.

Explanation:

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.