one thing

way; method; manner

steam (water vapor) / vapor; vapour

refrigeration, the process of transferring heat from an object in order to cool it / a drop in temperature

(transitive) refrigerate, cool, cool down / (intransitive) drop in temperature

chemical reaction / reaction, response / feedback

to react chemically / to respond, to react / be responsive, be sensitive

chemistry (branch of natural science)

material, substance

chemistry (branch of natural science)