What do you call a person who travels around the world?

What do you call a area of deposition? Alcohol and tap water which will evaporate faster? When did they stop making mars bars? What are large crack in Earth's crust called? What are the components of an electrochemical cell? What SUBSTANCE has high concentration of OH? What is the first step of debugging? Can more than one element share the same chemical symbol? Does a blizzard contain rain or hail? What protista has Glass or silica in shells? The normal boiling point of chloroform which has a higher vapor pressure than water at 100 and degC is? What are the five basic substances that make up protoplasm? When the sun shines directly over The Tropic of Cancer in the southern hemisphere what solstice is it? What is the active metabolite of pencilin? How does the biconcave disk help a red blood cell carry out its function? What controls dwell? How do we protect ourselves when we eat bacteria? What size wire is needed to run a 75 amp 240 volt circuit with 100 ft run? What is the Volcano near Pompei? When was A Million Light Years Away created?