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Definitions
Definitions
Definitions
Multiple Choice
Open-Ended
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 a dependent variable?
100
A question used to focus the purpose of a scientific investigation and the procedures used to complete it.
What is research?
100
Annessa designed an experiment to study how temperature affects the rate at which an enzyme digests a protein. She put equal-sized test tubes, brought to the test tubes to different temperatures, introduced equal amounts of enzyme to each tube, and measured the duration of the chemical reaction. What parameters were held constant in Annessa's experiment.
What is liver mass, test-tube size, and enzyme amount?
100
When a scientist designs an experiment, he or she must make instructions that are clear enough so that any other scientist can preform the experiment. Identify two places where your classmate's instructions were especially clear.
What is they can run the trials again and vary the amount of mass?
200
A decision based on investagtion 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 a fair test?
200
The number of observations or data.
What is sample size?
200
How scientific community confirms that a scientist's work is valid.
What is other scientists may carry out the same experiment to see if they get the same result?
200
Why is it important never to return used chemicals back to their original containers?
The used chemicals may be contaminated.
300
A controlled variable in an experiment that is kept the same from trial to trial.
What is a constant?
300
An idea that can be tested by a scientific investigation
What is a hypothesis?
300
An investigation in which all variables are identified and recorded so that the investigation can be repeated
What is a systematic investigation?
300
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. Four steps of the activity are listed below, but not in the correct order. 1. Find the masses of four bobs. 2. Construct a table to record data. 3. Time the duration of one swing. 4. Tie the bobs to four strings of equal length. Which order should these steps be in?
What is 2-1-4-3?
300
To start her investigation, Juanita takes her glider to her schools gym and makes 10 test flights. She wants to know the lengths of the shortest and longest flights. Name two things Juanita must do to know the distances of the shortest and longest flights?
She should measure the distance of each flight and record the distance she measures.
400
A set of observations made in an experiment, in which the independent variables are not changed, to be sure that the dependent variable remains the same also.
What is a control group?
400
A variable that is isolated for study in an experiment and that the experimenter manipulates
What is an independent variable?
400
factor that changes in an experiment
What is a variable?
400
Jack hypothesized that robins prefer large birdhouses to small ones. He built four birdhouses of different sizes to test his hypothesis. What was the independent variable in Jack'sstudey?
What is the size of the birdhouse.
400
Juanita considers shortening the wings, adding weight near the nose, and lengthening the tail-all at the same time. After some thinking, she realizes that this is not the best way to figure out how to improve her glider. Why do you think Juanita decided this was not the best way to improve her glider?
She should test one variable at a time.
500
A variable that is kept the same from trial to trial.
What is a controlled variable?
500
Having the ability to get similar results from multiple trials
What is a reproducible?
500
Paco wants to find out whether the baseballs used in his league fly farther than the balls used the year before. He has noticed that many more home runs have been hit this year than last year, so he thinks the new balls have more bounce. Paco wants to design an experiment to test this idea. State Paco's hypothesis and find the independent variable, dependent variable, and a constant.
What is Paco's hypothesis is, if a new baseball has more bounce, then it will fly farther and lead to more home runs. The independent variable is the new baseball, the dependent variable is the number of home runs. One constant is the baseball bat he uses?
500
In 1999 a team of researchers claimed that they had made a new element. Two other teams repeated the experiment but could, not produce the the result. The original team took back its claim. What do these events say about the process of scientific inquiry?
What is experimental results must be reproducible to be accepted as valid?
500
How can Juanita keep factors such as wind speed and direction constant?
She should conduct her experiment in the gym where the wind speed remains constant.