i don't understand this question please help(science question)?

Question

true or false.
if you did not controll variablesin an experoment there would be no way to tell which variable explained your results.

I need to know what it is asking,not the answer i just want to know what is it asking?

Answer 1

You need to know exactly which factors affect the experiment you're conducting - such as the surroundings, the exact duration of the experiment process, the people who are conducting it, the temperature, the fabrics etc. Those are all the elements which can vary - also named the "variables".

Now, at the end of every experiment there is a result of it - this is why the experiment is being conducted in the first place - to find out something you're interested in. So, basically - the result of the experiment can turn one way or the other, and you need to know exactly which of the variables made it go left, which made it go right, which made it go wrong, which made it go right. ;)

That's all the wisdom of it. Did it help?

Answer 2

K you're doing an experiment. You perform this experiment two times. The second time you do the experiment you change one thing to see if that one thing will bring a different result than the first time you did the experiment. You do everything else exactly the same. That one thing you change is called the "variable".

What if, instead of just changing just one thing the second time you do the experiment, you change three things that you have never tested before. How will you know which one thing actually made the different result?

Answer 3

Variables effect results so if you don't know the type or number of variables, you cannot predict the outcome.

Example - there is a leak under the sink. The plumber says it is A and it would be B. If he fixes both, the the leak is fixed but you will never know if it was A, B or both. Hence the idea of controlling variables.

Answer 4

All too often, especially in the health and medicine world, a study will vary more than one parameter and then attribute the results to the one they want to promote.

The DASH study was used to establish that reducing salt lowers blood pressure, but in addition to reducing salt, they added in salads and other foods rich in calcium and magnesium. Blood pressure dropped. They concluded that salt was what did it. There is no way to know which. They could have varied just the salt, but then they would have found that salt has no effect on 98% of the population, and even in those, not a medically significant one. But their entire house of cards is build on the notion that salt is bad tor you.

This sleight of hand is done ALL the time. Change several things, pick the one you want to credit any positive results to.

Answer 5

its like a 3 variable math equation. if you know 2, you can find the last one.
If you cant control any variable, you dont have an experiment result.
Therefore: true