What is a valid reason why a scientist might reject a scientific theory?
As additional scientific evidence is gathered, a scientific theory may be modified and ultimately rejected if it cannot be made to fit the new findings; in such circumstances, a more accurate theory is then required.
Can a scientific theory be rejected?
A scientific theory is not the end result of the scientific method; theories can be proven or rejected, just like hypotheses.
What is the factor that may change in response to the manipulated variable?
Explanation: In a scientific experiment, the factor that may change in response to the manipulated variable is called the PREDICTION variable.
Is age an independent variable?
It is a variable that stands alone and isn’t changed by the other variables you are trying to measure. For example, someone’s age might be an independent variable. Other factors (such as what they eat, how much they go to school, how much television they watch) aren’t going to change a person’s age.
What is a dependent variable easy definition?
The dependent variable is the variable being tested and measured in an experiment, and is ‘dependent’ on the independent variable. An example of a dependent variable is depression symptoms, which depends on the independent variable (type of therapy).
What does variable mean?
A variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x, y, and z are common generic symbols used for variables.
What is a extraneous variable?
Extraneous variables are all variables, which are not the independent variable, but could affect the results of the experiment. These other variables are called extraneous or confounding variables.
How do you prevent extraneous variables?
One way to control extraneous variables is with random sampling. Random sampling does not eliminate any extraneous variable, it only ensures it is equal between all groups. If random sampling isn’t used, the effect that an extraneous variable can have on the study results become a lot more of a concern
Can age be an extraneous variable?
Extraneous variables are often classified into three main types: Subject variables, which are the characteristics of the individuals being studied that might affect their actions. These variables include age, gender, health status, mood, background, etc.
What is an extraneous solution example?
An extraneous solution is a root of a transformed equation that is not a root of the original equation because it was excluded from the domain of the original equation. Example 1: Solve for x , 1x − 2+1x + 2=4(x − 2)(x + 2) .
How do you know if a solution is extraneous or extraneous?
To determine if a solution is extraneous, we simply plug the solution into the original equation. If it makes a true statement, then it is not an…
Why is an extraneous solution?
The reason extraneous solutions exist is because some operations produce ‘extra’ answers, and sometimes, these operations are a part of the path to solving the problem. When we get these ‘extra’ answers, they usually don’t work when we try to plug them back into the original problem.
How do you know if an answer is extraneous?
They arise from outside the problem, from the method of solution. They are extraneous because they are not solutions of the original problem. This answers your second question. To tell if a “solution” is extraneous you need to go back to the original problem and check to see if it is actually a solution.
What does it mean to check for extraneous solutions?
Extraneous solutions are ones that appear when you work through the problem, but don’t work when plugged back into the original equation. Be careful to check your work!.