The atoms of gold would be the same as the atoms of iron and have the same properties. True or false?

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

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.