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.
knitting needles. Check or Carry-on. In general, you may place your knitting needles and needlepoint tools in carry-on or checked baggage. Circular thread cutters or any other cutter or needlepoint tools that contain blades must be placed in checked baggage. You are permitted to keep scissors smaller than 4 inches in your carry-on baggage.