Show:
definitions
definitions
questions
questions
NJ Ask
100
the degree of conformity of measure to a standard or a true value
what is accuracy
100
the variable in the experiment that shows comparison to the independent variable may or may not change
What is dependent vairiable
100
a questioned to focus the purpose of a scientific investigation and the procedures used to complete it
What is research
100
How do scientific community confirm that the a scientist's work is valid?
Other scientist do the same experiment to get similar results
100
Juanita thinks like a scientist. she has a question, a hypothesis, and she has variables. She wants to test a glider and gliders have three variables(wingspan, weight and tail length) Which variable should she test first?
She should test one independent variable at a time
200
a dicission based on investagations and evidence
What is a conclusion
200
An experiment in which one independent variable is tested by keeping all other independent variables the same.
What is Fair Test
200
the number of observations or data
What is sample size
200
Dietrich designed an experiment to test the following hypothesis: the mass of a pendulum bob does not affect how long it takes the pendulum to make one complete swing. Find the correct order of the experiment.
1. Construct a table to record the table 2. Tie the four bobs to four strings of equal legnth 3. Time the duration of one swing 4. Find the masses of the four different bobs.
200
Juanita wants to test a glider but needs constant wind speeds. Where can she test her gliders?
In a gymnasium
300
a controlled variable and an experiment that is kept the same from trial to trials
What is a constant
300
An idea that can be tested by a scientific investigation.
What is hypothesis?
300
an investgation in which all variables are identified and record so that the investigation can be repeated
What is systematic investagation
300
Jack hypothesized that robins prefer large birdhouses to small ones. He built four birdhouses that differ in size. What was the independent variable in Jack's studies?
The size of the birdhouse.
300
A FAIR TEST makes a change in just one independent variable at a time, to see how the change affects the dependent variable. Ideally, only one independent variable should be tested at a time. Why would it be difficult to just test one independent variable at a time?
Because at the same time you are recording both the dependent variable and the independent variable.
400
A set of observations made in an experiment, in which the independent variables do not change, to be sure that the dependent variables are the same.
What is control group
400
A variable that is isolated for study in an experiment and that the experimenter manipulates.
What is independent variable?
400
a factor that changes in a experiment
What is variable
400
In 1999, a team of researchers claimed they have discovered a new element. Two other teams repeated the experiment but couldn't reproduce the result. What do these events say about the process of scientific inquiry?
Experimental results must be reproducible to be accepted as a valid.
400
Juanita is testing different distances of gliders. What is the control group?
The strength of the throw and direction.
500
variable that is kept the same from trial to trial
What is controlled variable
500
Having the ability to get similar results from multiple trials.
What is reducible?
500
Annessa designed an experiment to study how temperatures affect the rate at which an enzyme digest a protein. She put equal masses of liver onto four equal size test tubes, brought the test tubes to different temperatures, introduced equal amounts of enzyme to each tube, and measured the duration of a chemical reaction. What is a parameter were held constant in her experiment?
Liver mass, test tube size, and enzyme amount
500
Lewis wanted to know whether a new brand of shoe could make a basketball player jump higher. He found 18 basketball players who started using the shoes this season and measured how high each player could jump in the new shoes. What was the error in the investigation?
There was no control group.
500
Juanita is testing the distances of different gliders, name two things she must do to find the longest and shortest flights.
Measure the distance and the time.