# Key Words for Gcse Science Essay Sample

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Independent Variable- an independent variable is a variable that in the practical that can be changed e.g. the Beaker, what flame you use and what material you test on etc. something that can be changes, the variable of the practical you use but is not essential. It can be manipulated and changed. It is the independent utensil within the experiment. Dependent Variable- a dependent variable is a variable is a variable that in the practical measures the experiment, e.g. time, space, length etc. something that you need to find out in the practical what you are dependent on for its success. Control Variable- a control variable is the variable held constant in an experiment that never changes and isn’t meant to be changed e.g. Statistics, a person, a group and an event etc. The control variable controls the experiment. Hypothesis- a hypothesis is much like a theory, but with more background evidence supporting the hypothesis. Dictionary answer: 1) A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. 2) A proposition made as a basis for reasoning, without any assumption of its truth.

Prediction- A prediction is much like an estimate of a future occurrence, so a proved example of an outcome at the end of a practical. Conclusion- is the verified outcome of a practical after the experiment has been conducted, the written summarisation of what the experiment concluded. Evaluation- is the written summarisation of ALL the events occurred within the practical, what, why, when, how and could you improve it? Was it a fair test? Reliability of data- meaning to have reliable and valid evidence of information, it has to be verified, e.g getting information from a secondary resources is not always useful so you have to check how reliable it is for a practical. Outlier (Anomaly)- is something that happens, un-precedent and out of natural order e.g. if you put copper and sodium dioxide together and it explodes what does this mean, it’s an Outlier because it doesn’t usually happen. Line of best fit- shows whether these two variables appear to be correlated. Range of Data- A range of information at your arsenal.

Procedure- dictionary definition:
A manner of proceeding; a way of performing or affecting something: standard procedure. 2. A series of steps taken to accomplish an end: a medical procedure; evacuation procedures. 3. A set of established forms or methods for conducting the affairs of an organized body such as a business, club, or government. 4. Computer Science A set of instructions that performs a specific task; a subroutine or function

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