In the oxygen cycle, oxygen is (Choose one):

1.) added to and removed from the atmosphere by photosynthesis.

2.) added to the atmosphere by cellular respiration and removed by photosynthesis.

3.) added to the atmosphere by decomposers and removed by photosynthesis.

4.) added to the atmosphere by photosynthesis and removed by cellular respiration and combustion.

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!