What is the name for a system formed?

Is pouring tang into water a chemical change? What group does strontium belong? Can you wire 15 amp plug on a 20 amp circuit? What does every organism use for excretion? What is it called when hydrogen combines with hydrogen? What will happen when animal cells are in fresh water for a long time? Are smooth endoplasmic reticulum prokaryotes or eukaryotes or both? Is bacterium or an archaeon the older form of life? After a wildfire will the land regrow beter or not? When was the first space docking? Is the Garmin gps still the number one rated on the market? What are vestigial genes ...example? How many outer shell electrons do group two have? When a warm air mass and cold air mass stall next to each other its called a blank front? What it the term used to describe the energy needed to get a reaction started? What systems do plants have? Is steel a rock or mineral? What is the name of the deepest canyon on Venus? How stoma react with sugar solution? When two different by living in close association with each other the relationship is called?