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.
1 Taller boxes, such as cereal boxes should go around the edges a bag to create a stable wall. 2  Cans and other squat, heavy items should go in the bottom middle of the bag.  Medium sized staples, such as boxes of oatmeal or bags of rice, should go in the middle on top of the cans.