drag the tiles to the correct boxes to complete the pairs. Match each step in the nitrogen cycle to its description.

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.

. ph changes the ability of them he enzyme to dissolve in water.

burning fossil fouls really decrease the carbon in the atmosphere so b