how and why is the atmosphere in the classroom different from what it used to be a generation earlier?
Answers
Answer:
ANSWER :)
Early earth's atmosphere was reducing atmosphere. It contained actively reducing gases such as hydrogen, carbon monoxide, and hydrogen sulfide. There was no oxygen in the atmosphere. As chemical energy gradually reduced, this was proven to be a positive environment for photoautotrophs like cyanobacteria to evolve the photosynthetic metabolic pathways using sunlight as an energy source. Due to photosynthesis by cyanobacteria, there was gradual increase in the oxygen level of the earth's atmosphere. This changed a reducing atmosphere to an oxidizing atmosphere.
if u c in modern times u can c many changes around u in the class..like smartboards,cupborads made of wood mainly table and sitting chair which were not used in olden days..u can also notice some stationery improvements like mechanical pencils etc...there are also new improvised notice boards and writing boards like whiteboards and marker...now the question comes why?...because of growing technology and life of a student would be incomplete without those as for nowadays!!
mark it as brainliest and give me a thumbs up!!
bye frnd :)