experimental design science test Flashcards
(19 cards)
what is a hypothesis?
a proposed explanation made on the basis of limited evidence as a starting point for further investigation. a hypothesis is a sentence of what you can guess is going to happen in the experiment before the results have been shown.
what is a variable?
A variable is anything that can change or be changed. It is any factor that can be manipulated, controlled for, or measured in an experiment.
what is a method?
a method is process in which you follow steps to do the experiment by using pictures or plotted information to follow
what is a result?
it is the data that you have collected from your experiment that can be presented in a graph or a table
what is a discussion?
once all the results are gathered, you analyse your results by using independent, controlled and dependent variables were in your experiment. this is presented in a paragraph form
what is a conclusion?
a conclusion is a paragraph that answers the question to the topic and gives information from the results to what happened in the test. it answers the hypothesis and outlines if any changes could happen to sum up the data
what is an independent variable?
a variable (factor) that is changed in an experiment.
what is a dependent variable?
a variable in an experiment is the thing that is being measured. eg: measuring the temperature of water
what is a correlation?
when results in an experiment show that the independent and dependent variables are related
what is a systematic error?
errors that affect the accuracy ( how far off the measurement is from the true value) causing instrumental errors which differ from the value by an amount each time it’s measured
what is a random error?
errors that are unpredictable or occur due to a chance. A random error may be caused by slight fluctuations in an instrument, the environment, or the way measurement is read, that do not cause the same error every time.
what are personal errors?
Personal errors include mistakes or miscalculations such as measuring a height when the depth should have been measured or misreading the scale on a thermometer
what is quantitative data?
quantitative data is something that is being measured
what is qualitative data?
Qualitative observation deals with data that can be observed with our senses
what is a outlier?
a data value that is outside the normal range of the other results
what is the median?
The median is the middle value of the data after all the numbers have been placed in increasing order.
what is the mode?
The mode is the most common number in the set of data.
what does a positive correlation look like on a graph?
it goes from the bottom left corner diagonal out the graph
what does a negative correlation look like?
it goes from the right end up towards the y-axis on an angle
