In printed form, the oxford english dictionary
a. is about the size of a large cookbook
c. could not be contained in a single room
b. consists of many volumes
d. was last published five years ago

When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.