Which is the best reason that a geologist might carry a small dropper bottle filled with hydrochloric acid when doing fieldwork?

Abag contains purple marbles and red marbles, 114 in total. the number of purplemarbles is 6 more than 5 times the number of red marbles. how many purplemarbles are there?

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

You could say the relative location of washington, d.c.