Science Vocabulary Vocabulary for GCSE ISA - words that might come up in the exam! (Most of these words are to do with data.) QuizMaster99 published on December 05, 2013 Stacked 1/19 Define uncertainty. The interval in which the true value can be expected to be a lie. Something you don't know at all. Something that is right. 2/19 What is zero error? An error that occurs when there is a false measuring reading, e.g. when the needle of an ammeter does not go back to zero even when the current is stopped. A reading that differs from the true by a consistent amount each time a new measurement is made. Santa eats your Christmas pudding , so there is no pudding - zero pudding. 3/19 What is a measurement error? The difference between a measured value and a true value. The difference between a cake and a pie. Something the ruler measured wrong. 4/19 What is random error? An error in measurement caused by factors which vary from one measurement to another. An error having a non-zero mean, so that its effect is not reduced when observations are averaged. An error in eating mince pies. 5/19 The quantity between readings, e.g. a set of 11 readings equally spaced over a distance of 1 metre would give an interval of 10 cms. This would be an... Precision. Prediction. Interval. 6/19 What are the control, dependent and independent variables? Some random things that I don't need to know. *Control - things you keep the same.*Independent- the things you change.*Dependent - the changes in the independent variables, which you measure. Variables that are cool. 7/19 What does "range" mean? The maximum and minimum values of the independent or dependent variables; important in ensuring that any pattern is detected. E.g. from 50-10cm or from 10-50cm. How big and small something is. The maximum value of an independent variable. 8/19 What is a prediction? What will definitely happen no matter what. A thing you eat. A statement suggesting what will happen in the future, based on observation, experience or a hypothesis. 9/19 A continuous variable is what? A variable that can be given a great size by either counting or by measurement. (Goes on forever.) Just some random thing that stops when it feels like it. A variable that is only one unit. 10/19 What is the difference between a valid conclusion and an non-valid conclusion? A valid conclusion is supported by valid data, and is obtained from a appropriate experiment. Whilst a non-valid conclusion is not supported by anything nor ... A valid conclusion is supported by data, and is obtained from a random experiment. Whilst a non-valid conclusion is not supported by a relevant experiment. A valid conclusion is lovely, whilst a non-valid one is OK. 11/19 How do you draw a sketch graph? A perfect graph, nothing wrong at all. Draw a line that is not necessarily on the grid that shows the general shape of the relationship between two variables. Do not have any points plotted and al... A random graph that doesn't relate to anything. 12/19 What is calibration? A process you do to check everything is as it should be. A process that makes your phone go weird. Something that eats cake. 13/19 What does "repeatable" mean? A result that has the same answer when the original experimenter does the same investigation again using the same method and equipment. A test that has been done by another person, using different equipment or techniques but they get the same results. The smallest change in the quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading. 14/19 What is the definition of "reproducible"? A conclusion supported by valid data, obtained from an appropriate experimental design and based on sound reasoning. A line graph, not necessarily on a grid, that shows the general shape of the relationship between two variables. It will not have any points plotted and alth... A test that has been done by another person, using different equipment or techniques but they get the same results. 15/19 What is a systematic error? An error having a non-zero mean, so that its effect is not reduced when observations are averaged. An error that occurs when there is a false measuring reading, e.g. when the needle of an ammeter does not go back to zero even when the current is stopped. A reading that differs from the true by a consistent amount each time a new measurement is made. 16/19 This is the value that would be obtained in an ideal measurement. This would be a... Uncertainty Range. True Value. 17/19 What is this the definition of...Suitability of the investigative procedure to answer the question being asked. For example, an investigation to find out if the rate of a chemical reaction depended upon the concentration of one of the reactants would not be a valid procedure if the temperature of the reactants was not controlled. Resolution. Validity. Continious. 18/19 Precise measurements are ones in which there is very little spread about the mean value. This would be a... Range. Precision. Independent Variable. 19/19 What is a measurement error? The difference between a mushroom violin and a true violin. The difference between a measured value and a true value. The difference between a measured or a true value.
