Definitions
Definitions #2
Definitions #3
Questions
NJ ASK Review
100
The degree of conformity of a measure to a standard or a true value.
What is accuracy?
100
The factor in an experiment that changes as a result of a change in an independent variable.
What is dependent variable?
100
The process used to focus the purpose of a scientific investigation and the procedures used to complete it.
What is research question?
100
Where can you keep factors such as wind speed and direction so the wind will be constant.
Example: Gym.
100
How does the scientific community confirm that a scientist's work is valid.
Other scientists carry out the same experiment to see if they get the same result.
200
A decision based on investigation and evidence.
What is 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
Why might it be difficult one independent variable at a time
Many variables are at work when conducting experiments, and it's hard to name them all.
200
In what steps are in the correct order to test how the mass of a pendulum bob to make one complete cycle? 1. Find the masses of four different bobs. 2. Construct a table in which to record data. 3. Time the duration of one swing. 4. Tie the four bobs to four strings of equal length.
Order: 2-1-4-3
300
A controlled variable in an experiment that is kept the same from trial to trial.
What is constant?
300
An idea that can be tested by a scientific investigation.
What is hypothesis?
300
An investigation in which all variables are identified and recorded so that the investigation can be repeated.
What is systematic investigation?
300
What is the best way to test variables in an experiment.
Test all the variables once at a time for each variable.
300
Jack hypothesized that robins prefer large birdhouses to small ones. He built four birdhouses of different houses to test his hypothesis. What was the independent variable in Jack's study?
The size of the birdhouse.
400
A set of observations made in an experiment, in which the independent variable are not changed, to be sure that the dependent variable stay the same as well.
What is control group?
400
A variable that is isolated for study in an experiment and that the experiment manipulates.
What is independent variable?
400
A factor that changes in an experiment.
What is variable?
400
With a hang glider, which variable would you test first in order to fly farther: wing span, weight, or tail length.
The wings are more aerodynamic.
400
In 1999, a team of researchers playing claimed that it made a new element. Two other teams repeated the experiment but could not reproduce the same result,. The original team took back its claim. What do these events say about the process of scientific inquiry.
Experimental results must be reproducible to be accepted as valid.
500
A 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 reproducible?
500
Name two things you must know to examine different kinds of data.
1. Perform the experiment. 2. Analyze the data.
500
Why is it important to never return chemicals used in an experiment to their original container.
The chemical may have become contaminated.
500
Paco wants to find out whether the baseballs used n his league fly farther than the baseball used the year before. He noticed that many more home runs have been hit this year than last year, so he thinks that the new balls have more bounce. Paco wants to design an experiment to test his idea. Identify the independent variable, the dependent variable, and a constant.
Independent variable: new baseball Dependent variable: how far the ball travels Constant: baseball bat
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