What is salvency?

What instrument measures the length of a shell? How do you get a magic ball? What is the word called when a scientist conduct a experiment? What factors cause the atmosphere to constantly change? What are some examples of non ionising radiation? What is 43.5 notation form? In addition to a cell membrane what other cell boundary might a cell have? What is the synonym of effective? What does temperature mean in science? What is an sma-18 blood test for? How long do fluorescent lights last? Where can you find pictures of Cheetah fossils? What is the Immediate Response of the body To Cold Stimulus? Who proposed that electrons travel in definite paths? Which altitude zone ranges from 2500 to 6500 feet (760 to 2000 meters)? What are two ways to give an object potential energy? What are the four main types of scales? What is a varibale? Why scientists often test the conclusion of other scientists? What are somethings you know to be true that science cannot prove or explain?