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Why is it important that you keep two variables constant such as light level and color while you're testing and how does a third variable CO2 level affect photosynthesis?
Wiki User
∙ 12y ago
The first bit, "why is it important to keep to variables constant" is so you can be sure that the thing your measuring is what is affecting the change. So if your measuring the affect of CO2 levels on the rate of photosynthesis, you need to keep light level and any other variable constant through out the whole experiment so you know that it isn't a change in the amount of light that makes the rate of photosynthesis change but the change in CO2 level. I think that makes sense!
Also, CO2 increases photosynthesis until a certain point at which photosynthesis can't happen any quicker because all the chlorophyll is 'taken up' using the CO2 for photosynthesis and so the only way to increase photosynthesis rate would technically be to add more chlorophyll. This means that CO2 becomes whats called a 'limiting factor'. I think that makes less sense!
Wiki User
∙ 12y ago
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How is a constant and an independent variable similar?
An independent variable or manipulated variable is when you change it on purpose. For example, say your scientific problem was "Does certain substances affect how fast water is frozen?" Those substances are the indepentant variables. A dependant variable is how you measure the dependant variable. For instance, the dependant variable would be how fast the water is frozen. The things they have in common are that they are both variables and are subject to change.
What is one condition in an experiment that changes while all the others remain constant?
An experimental variable.
When a graph of two variables is a straight line passing through the origin the variables are said to be to each other?
It means that they are directly proportional to each other. As one variable increases, the other variable increases/decreases at a constant rate. The constant rate is determined by the gradiant of the straight line.
What is a manipulated variable in seed germination?
Manipulated variable is also known as the independent variable. The independent variable may determine if a seed germinates. Examples of manipulated variables for seed germination include: water, suitable temperature and air/oxygen. These basic variables are also the most important in seed germination.
In biology what is a variable?
There are three types of Variables; Manipulated, Controlled, and Responding. Variables its self is known as a condition that can change in an experiment.
Are constant variables and independent variables the same?
No they are not the same. A constant variable keeps going at a constant rate.
What are constant variables and y r they important in an experiment?
. Constant variables are variables which cannot be changed with the experiment. To remember their name is easy just think about Constance. They are important to an experiment because without all three variables there would be no complete experiment. Also the constant variables are important to an experiment because they help complete the result. Without a constant variable you. Would not be testing correctly
Is a constant a number variable or the product of a number and one or more variables?
A constant is not a variable at all, and none of its factors was a variable. It is constant.
What are some examples of constant variables in science?
A constant variable is a variable that gets changed by a physical substance
What is constant variable in c?
Constant variables refers to those variables whose values cannot be changed. These variables should be initialized along with their declaration. Attempt to change the value of a constant variable will generate compile error. The syntax for declaring a constant variable is:const data-type variableName = value;
What are all the variables?
There are 'constant variables' , 'independant variables' and 'dependent variables' Constant Variable- things in the experimment that should be kept the same Independant variables- something that can be varied in an experiment Dependant variable- something that can be affected
When the product of two variables is a constant?
The Control Variable
What kind of expression has no variables?
A numerical constant.
What means the variable that must be kept constant?
What variables must be kept constant
How many variables are kept constant in a experiment?
All variables except one, the experimental variable, are kept constant in an experiment.
Why is it important to have a constant in an experiment?
In order for the results to be valid, the dependent variable can only be affected by the independent variable, so somethings need to be kept CONSTANT. The things that need to be kept constant are called CONTROLLED VARIABLES. Even if controlled variables are affecting the dependent variable(s), which they usually do, keeping them constant will ensure that all trials of an investigation were equally impacted by the controlled variables, therefore allowing one to see the impact of an independent variable on the dependent variable. All in all, a 'constant' in a science experiment should actually be called a 'controlled variable' and the description of such a variable is described in the third point. Hope this clarifies.
What are the four variables in a science experiment?
The control, the constant, the independent variable, and the dependent variable.
