Why do scientists think the Grand Canyon was once covered by an ocean? (1 point) A Seawater has been found sleeping up through the canyon floor.
B The sedimentary rock type forming layers of the canyon formed under the sea
C Only an ocean would have the strength to erode the rock forming the Grand Canyon
D The Grand Canyon is located along coastlines that likely flooded
PLEASE HELP ME

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Part 1: include important facts found through your research. part 2: include your visual display. include your summary of “the chemistry of water” from the national science foundation website. include your experiment. part 3: include responses to the reflection questions.

Which characteristics can be used to differentiate star systems? check all that apply.