Rating Newest Oldest. Best Answer: Control variable is something is an experiment that doesn't change. It is not what is being tested. It is used to validate results. For example, you want to test if plants grow better in red of blue light.ou need to give each plant the same amount of water at the same time and need to keep the temperature constant. You change the color of light. Your control variables are: amount of water, time of water, and temperature because they are always the same.
Aftermath at Gettysburg and the American Civil War. The Battle of Gettysburg changed the lives of not only the soldiers, but also Gettysburgâs residents. The Battle of Gettysburg resulted in 51,000 casualties (killed, wounded, captured and missing).
Nebraska. This site lists the dead being spread out over a 25 square mile area. http://www.gettysburgfoundation.org/39/history-of-gettysburg. Roughly 7,000 men died on the battlefield at Gettysburg in three days of fighting â almost three times the population of the town (2,400).