During science class billy used litmus paper to determine the ph of an unknown liquid. the blue litmus paper turns red but there was no change in the color of the red litmus paper. the liquid billy tested is probably a. a base. b. neutral. c. an acid. d. of ph 7.

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.