Is Nitrogen the same as Nitrogen Dioxide (or included in the same category of Nitrogen)? Are they both considered the “most abundant gas in the atmosphere”?

Sarah is sitting at the top of the slide in the schools playground. which will increase sarah’s kinetic energy a- an additional child is added to the top of the slide. b- sarah is pushed and moves down the slide. c- sarah climbs down the ladder and off the slide. d- the ladder is moved to the other side of the yard.

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

Several billion years ago which gas was the least prevailant in the atmosphere