Aluminum: what is the color?
is it shiny or dull?
is it malleable, ductile, or brittle?
is it a conductor, magnetic, or neither?
is it a metal or a nonmetal?
where is it located on the periodic table on the left side of the stairs or right side of the stairs?

Identify two types of chemical bonding in the source of dietary potassium

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

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.