Which statement describes a process involved in the evolution of earth’s early atmosphere? - cyanobacteria transformed carbon dioxide in the atmosphere into oxygen during photosynthesis. - heavier gases escaped through earth’s atmosphere, leaving only lighter gases such as oxygen behind. - volcanic eruptions produced enough oxygen to create earth’s atmosphere. - the amount of oxygen in the atmosphere declined due to respiration, or breathing.

3.) for each of the following compounds, draw the major organic product of reaction with hcl or naoh and circle whether the starting materials and products will be more soluble in organic solvent or water benzoic acid + hcl: benzoic acid + naoh: oh benzoic acid water/organic water organic fluorenone hс: fluorenone + naoh: fluorenone water/organic water/organic веnzocaine + hci: benzocaine + n»oh: h2n benzocaine water/organic water organic o=

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Which factors would have influenced earth’s climate during the time of pangea? check all that apply. land covered by glaciers one large landmass one large ocean tectonic activity multiple small seas