What are the three states in which water exists on Earth?

The minerals found in bones are deposited by living cells called

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.