Show:
Definitions 1
Definitions 2
Definitions 3/Question
Questions/NJ ASK Review 1
NJ ASK Review 2
100
What is accuracy?
Accuracy is the degree of conformity of measure to a standard or a true value.
100
What is a dependent variable?
A dependent variable is the factor in an experiment that changes as a result of a change in an independent variable.
100
What is a research question?
A research question is a question used to focus the purpose of a scientific investigation and the procedures used to complete it.
100
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?
Juanita 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.
100
Dietrich designed an experiment to test whether the weight of a pendulum bob effects how long it takes it to make one full swing.His four steps are listed below but not in the correct order: 1 Find the masses of the bobs 2 construct a table to record the data 3 time the duration of the swing 4 tie the four bobs to four stings of equal length How should it be ordered?
2-1-4-3 should be the order of the steps
200
What is conclusion?
Conclusion is a decision based on investigation and evidence.
200
What is a fair test?
A fair test is an experiment in which one independent variable is tested by keeping all other independent variables the same.
200
What is a sample size?
A sample size is the number of observations or data.
200
When Juanita is testing her flights with the clip, why is it important that she writes down the location of the clip and the results each time? Suggest one way that she can test the accuracy of the data set for when the clip is 5 centimeters behind the plane's nose.
According to Juanita's data graph it is important to write down the location of the clip and the results because the clip could have moved or the wing could have broke. She can run the trials again and vary the amount of mass to test the accuracy of the data set when the clip is 5 centimeters behind the plane's nose.
200
Jack hypothesized that robins prefer larger bird houses. He built four different sized bird houses to test his hypothesis. What was his independent variable for this experiment?
The size of the bird house was the independent variable in the experiment.
300
What is a constant?
A constant is controlled variable in an experiment that is kept the same from trial to trial.
300
What is a hypothesis?
A hypothesis is an idea that can be tested in a scientific investigation.
300
What is a systematic investigation?
A systematic investigation is an investigation in which all variables are identified and recorded so that the investigation can be repeated.
300
Why is it important never to return chemicals used in an experiment to their original containers?
Chemicals that have been used outside their container may become contaminated with other chemicals.
300
In 1999 a team of researchers claimed that they had found a new element. Two other teams repeated the experiment but could not reproduce the results.What does this say about the experiment?
This shows that experimental results must be reproducible to be considered as valid
400
What is a control group?
A control group is a set of observations made in an experiment and which the independent variables are not changed to be sure that the dependent variables stay the same also.
400
What is an independent variable?
An independent variable is a variable that is isolated fro study in an experiment and that the experimenter manipulates.
400
What is a variable?
A variable is a factor that changes in an experiment.
400
Annessa designed an experiment to study how temperature affects the rate at which enzyme digests protein. She put equal masses of liver into four equal-sized test tubes, brought 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?
Liver mass, test-tube size, and enzyme amount were the parameters held constant.
400
Lewis wants to know whether a new brand of shoe could make a basketball player jump higher. He found 18 players who started using the shoes and measured how high they could jump in the new shoes. What should Lewis make sure he doesn't forget in his experiment?
Lewis should make sure he doesn't forget to add a control group.
500
What is a controlled variable?
A controlled variable a variable that is kept the same from trial to trial.
500
What does reproducible mean?
Reproducible means to have the ability to get similar results from multiple trials.
500
After Juanita threw two gliders she needs to know the distance of the shortest and longest flight, how can she calculate this? If you were Juanita which of the three variables (wingspan, weight, and tail length) would you test first, why? It might be difficult to test only one independent variable at a time, so what should Juanita do?
To calculate the shortest and longest flight Juanita needs to measure the distance of each flight and record each distance she measures. Always test one variable at a time. I fi were Juanita i would make the the wingspan shorter first fro more aerodynamics. She should conduct here trials in a gym where wind remains constant to be sure that she only tests one independent variable at a time.
500
How does a scientific community confirm that a scientists work is valid?
Other scientists carry out the same experiment to see if they get the same result.
500
Paco wants to find out weather the baseballs used in his league fly farther than the baseballs 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, the independent variable, dependent variable, and one variable that must be held constant in Paco's experiment.
Hypothesis- If a new baseball has more bounce then it will fly further and lead to more home runs. Independent Variable- the new baseball Dependent Variable- the distance the ball goes or the number of home runs Constant- type of bat, same pitcher, wind, and person batting