In an experiment, a control is used to establish a baseline to compare the results of the main experiment to. Having a control group rules out any environmental variables, such as temperature and... In an experiment, a control is used to establish a baseline to compare the results of the main experiment to. Having a control group rules out any environmental variables, such as temperature and...
Knives, including small pocket knives, are only allowed in checked bags. Only plastic and round-tip butter knives are allowed as carry-on blades. Most bladed items are allowed in checked baggage, including scissors, razors, swords, axes, box cutters and blade tools, if they are properly wrapped or sheathed.
Not allowed on carry on: Razor-Type Blades - such as box cutters, utility knives, razor blades not in a cartridge, but excluding safety razors. Check out the tsa prohibited items website. Source(s): http://www.tsa.gov/travelers/airtravel/p...