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deffinitions
deffinitions
deffinitions
nj ask questions
nj ask questions
100
what's accuracy
the degree of conformity of a measure to a standard or a true value
100
what's a dependent variable
the factor in an experiment that changes as a result of a change in an independent variable
100
what's research question
a question used to focus the purpose of a scientific investigation and the procedures used to complete it
100
Name two things Juanita must do to know the distances of the shortest and longest flights
in order for juanita to know the distances of the longest flights she must measure the distance of each flight and record each distance she measures
100
juanita already has a control group. what is it?
her control group was the first ten test flights
200
what's conclusion
a decision based on investigation and evidence
200
what's fair test
an experiment in which one independent variable is tested by keeping all other independent variables the same
200
what's a sample size
the number of observations or data
200
why do you think juanita decided that this was not the best way to figure out how to improve her glide
she should test one independent variable at a time
200
juantia's hypothesis (her testable idea) is now more focused. restate it.
if i put a 25 gram clip in a certain spot along the glider then it will glide farther.
300
what's constant
a controlled variable in an experiment that is kept the same from trial to trial
300
what's hypothesis
an idea that can be tested by a scientific investigation
300
what's systematic investigations
an investigation in which all variables are identified and recorded so that the investigation can be repeated
300
if you were juantia, which of the three variables would you test first. why?
you should always test one variable at a time. i would test shortening the wingspan first for more aerodynamics and more surface area to get more lift
300
what is juantia's independent variable
the independent variable is the 25 gram clip
400
what's a control group
a set of observations made in an experiment, in which the independent variables are not changed, to be sure that the independent variable remains the same also
400
what's independent variable
a variable that is isolated for study in an experiment and that the experimenter manipulates
400
what's a variable
a factor that changes in an experiment
400
Suggest how juanita can keep factors such as wind speed and direction constant in her trials.
she should conduct her trials in gym where wind remains constant
400
what's juanita's dependent variable
the dependent variable is the distance the glider travels
500
what's a controlled variable
a variable that is kept the same from trial to trial
500
what's reproducible
having the ability to get similar results from multiple trials
500
why might it be difficult to test just one independent variable at a time? use example of juantia and her glider in your answer
fair test makes a change in just one independent variable at a time to see how the change affects the dependent variable. many variables are at work when conducting experiments it's hard to name them all
500
juanita's friend charelle says that juanita is working too hard. charelle says that each time juanita moves the clip, she should throw the glider only once. will this method produce a sufficient sample size?
she must match the location of the clip to the length of the flight and record keeping will let her know which location of the clip would work best.