Earth's second atmosphere ( atmosphere ii ) was a thick atmosphere of primarily water vapor and carbon dioxide. what effects did this have on earth?

helium and hydrogen gases escaped earth's gravity.

heat energy was retained and water vapor condensed.

ultraviolet light split water vapor into hydrogen and oxygen.

increased oxygen allowed reptiles to thrive.

Based on the results of this study, what questions remain unanswered? how can these questions guide future research

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.