On the ph scale select one: a. the lower the whole number on the scale, the greater the h+ concentration. b. a tenfold difference in hydrogen ion concentration separates each whole number. c. ph values above 7 are basic (alkaline). d. all of the answer choices are correct.

Show and image of the mixtures or write them

They both go downwards and the can break apart rocks 

Large asteroid and comet impacts. because they can have a huge impact on the environment, such as a loss of land, and crust on the earth with the big holes they produce. on the other hand, volcanic eruptions can also cause change within the environment by producing land, but im actually not quite sure which one would be a better answer, hopefully you read this and didnt just flat out choose the first sentence i have spoken! your welcome~