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Give a good definition of hypothesis, aim, control treatment, and the variables.I need...

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ruvinrice | Student, Grade 10 | eNoter

Posted May 27, 2012 at 11:19 AM via web

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Give a good definition of hypothesis, aim, control treatment, and the variables.

I need a good definition of all these terms. And by the variables I mean the independent, dependent and the control.

 

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bandmanjoe | Middle School Teacher | (Level 1) Senior Educator

Posted May 28, 2012 at 6:43 PM (Answer #1)

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These are all parts of a process scientist use to solve problems called the "scientific method".  The hypothesis is an "educated guess", it is your prediction to what the outcome of the experiment will be.  It is your best guess as to the outcome of the experiment, which is the next part of the process.  The aim is the main purpose of the design of the experiment.  You thing one factor causes something, and you "aim" to design an experiment to either prove or disprove whether that factor is a valid consideration.  In this experiment, the factor you think is causing the outcome is called the independent variable.  This is the variable you will change.  You will then measure the effect the change in this independent variable produces on whatever it was exercised upon.  This measured change is called the dependent variable.  A good way to remember the difference between the two is the dependent variable "depends" upon the independent variable.  All other factors in the experiment we would want to control, they are known as control variables.  The reason we control them is so we know if their was a measurable change or effect, it was caused by the independent variable, and not something else.

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cuyler | Student , Undergraduate | Honors

Posted May 27, 2012 at 12:14 PM (Answer #2)

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Well a hypothesis is a statement that shows your expectations of the outcomes of the expriment and it is always good to state everything specifically (noamlly start with "its is expected that"). for example, It is expected that the blue and red substances being tested will contain glucose.

Aim is what you want to test in the expriment. (good to start with "to investigate" or "to determain"). For example, To determain if the blue and red substances contains glucose.

Controlled or fixed variable is something that does not change throughout the expriment. For example, the tempreture of the blue and red substances.

Independant Variable is something you change in the expriment. For example, the indicator used with the blue and red substances.

Dependant Variable is basically you results. For example the amount of colour change seen in the indicators.

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