Vocab
Vocab
Open Ended
Open Ended and NJ ASK
NJ ASK
100
define accuracy and conclusion
accuracy- the degree of conformity of a measure to a standard or true value conclusion- a decision based on evidence and investigation
100
define independent variable
What is a variable that is isolated for the study of an experiment and that the experiment manipulates
100
If you were Juanita, which of the three variables would you test first. Wingspan, weight, or tail length?
I would test the wingspan first because I think that would help the glider go farther than if you tested weight or tail wind.
100
What is Juanita's independent variable? Dependent variable?
independent- tail length, wingspan, weight, placement of clip dependent- time
100
2. How does the scientific community prove that a scientist's work is valid?
a. other scientists carry out the same experiment to see if they get the same result
200
define constant and control group
constant- a controlled variable that is kept the same from trial to trial control group- a set of observations, where the independent and dependent variables aren't changed
200
define reproducible
What is having the ability to get similar results from multiple trials
200
How can Juanita keep factors such as wind and direction constant?
She can conduct her experiment in a gym so there is no wind.
200
why is it important that Juanita writes down the location of the clip and the sample size each time?
so that her results are organized and she knows how far it went on average
200
3. 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 a complete swing. List these 4 steps of the experiment in order 1.find the masses of the bobs 2.construct a data table 3.time the duration of one swing 4.tie the bobs to 4 strings of equal length
1-2-4-3 (a)
300
define controlled variable
What is a variable that is kept the same from trial to trial
300
define research question and sample size
research question- a question used to focus the purpose of a scientific investigation and the procedures used to complete it. sample size- the number of observations or data
300
Why might it be difficult for Juanita to test just one independent variable at a time?
because some variables rely on others and change them example: changing the wingspan or tail length may also change the weight of the glider
300
why are there some unusual values in Juanita's table? What are they
uncontrolled variables; 15 and 14 m for 5 cm nose clip
300
4. 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 his study
a. the size of the birdhouse
400
define dependent variable and fair test
dependent variable- a factor in an experiment that changes as a result of a change in the independent variable fair test-
400
define systematic investigation
What is an investigation in which all variables are identified and recorded so that it can be repeated
400
What is Juanita's control group?
the length of the school gym
400
Why will throwing the glider only once every time she moves the clip not produce a sufficient sample size?
because it will not be as accurate and variables that cannot be controlled will make it inaccurate
400
5. In 1999, a team of researchers claimed that it had made a new element. Two other teams repeated the experiment but could not produce the original results. The original team took back its claim. What do these events say about the process of scientific inquiry? 6. Lewis wanted to know whether a new brand of shoe could make a basketball player jump higher. He found 18 bball players who started using the shoes this season and measured how high each player could jump using the shoes. What error did he make in his investigation?
5. c. Experimental results must be reproduced to be proved as valid. 6. b. There was no control group
500
define hypothesis
What is an idea that can be tested by a scientific investigation
500
define variable
What is a factor that changes in an experiment
500
What is Juanita's focused hypothesis
the farther the 25 gram clip is placed along the body, the farther the glider will go. The longer the tail, the farther it will go
500
NJ ASK 1- Annessa designed an experiment to study how temperature affects the rate at which an enzyme digests a protein. She put equal masses of liver into four test tubes, brought the test tubes to different temperatures, introduced equal amounts of enzymes to each tube, and measured the duration of the chemical reaction. What parameters were held constant in her experiment?
b. liver mass, test-tube size and enzyme amount
500
Paco wants to find out whether the baseballs used in his league fly farther than the baseballs used the year before. He has noticed that more home runs have been hit this year than last year, so he thinks the new balls have more bounce. He wants to create an experiment based on this. State his hypothesis, independent variable, dependent variable and constant.
hypo- The new baseballs will go farther than the old ones when hit independent- 2 different baseballs dependent-time constant- person hitting the balls
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