I think you're referring to the "control".
Read more here: http://en.wikipedia.org/wiki/Scientific_control
All variables except for the independent and dependent variables should be kept the same. The other two will be changed by a fixed amount and by an unknown amount to be discovered during the experiment, respectively.
An experiment must have a control to show what would happen if no factors were changed.
Experts agree that in order for an experiment to be counted as 'good science' or a 'good experiment', they must contain three things:A controlData collected from the experiment, usually put into a table/chart/graphA conclusion drawn from the experiment~Information obtained from: http://www.chacha.com/question/what-are-least-three-things-you-should-be-careful-to-do-when-designing-an-experimentI do not claim ownership of the above website nor its trademarks and I do not claim ownership for the information.
use t he internet to find out its what i do :P loser lol
you must repeat and redo the experiment
In an experiment, variables that must be kept constant are called control variables. Two common examples include temperature and pH levels. These variables should be kept constant to ensure that any changes observed in the dependent variable are a result of the independent variable being tested.
Factors that must remain constant in an experiment are called control variables. These factors are kept consistent to ensure that any changes in the dependent variable are due to the manipulation of the independent variable. Control variables include things like temperature, time, type of equipment used, and environmental conditions.
If they are supposed to affect the results in the experiment ie. they are what is being tested, they are the test variables. If they must be kept the same to ensure a fair test ie. the scientist is not testing with them, they are called control variables.
Variables that must be kept constant in an experiment are known as control variables. These variables are factors that can influence the outcome of the experiment, so keeping them constant ensures that any observed changes are due to the independent variable being tested.
All variables except for the independent and dependent variables should be kept the same. The other two will be changed by a fixed amount and by an unknown amount to be discovered during the experiment, respectively.
Yes, some people keep sea horses as pets. They are not easy animals to keep because they require good water quality, constant water flow and a special diet. If you want to keep seahorses as pets you should start by researching the care of other saltwater animals. The more you know about the species of animal you want to keep the better.
An experiment must have a control to show what would happen if no factors were changed.
What variables must be kept constant
Experts agree that in order for an experiment to be counted as 'good science' or a 'good experiment', they must contain three things:A controlData collected from the experiment, usually put into a table/chart/graphA conclusion drawn from the experiment~Information obtained from: http://www.chacha.com/question/what-are-least-three-things-you-should-be-careful-to-do-when-designing-an-experimentI do not claim ownership of the above website nor its trademarks and I do not claim ownership for the information.
use t he internet to find out its what i do :P loser lol
a controlled experiment must have only one manipulated variable becuase if the experiment had multiple manipulated variables then it would not be a controlled experiment anymore it would be a manipulated Deseret experiment
you must repeat and redo the experiment