An electric current is passed through water and bubbles start forming. what is a logical conclusion for the bubbles? a) water is evaporating. b) the water had impurities in it. c) a physical changes has occurred. d) hydrogen and oxygen are being formed.

Evaluate this exponential expression,8. (2 + 3)2 – 42

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Which best explains why an iceberg floats?