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AP Bio - Scientific Method & Life Review Flashcards | StudBud
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AP Bio - Scientific Method & Life Review
AP Bio - Scientific Method & Life Review
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scientific method
Flashcards
29 cards
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Practice quiz
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Questions
29
Answers
1
Which of these is abiotic?
number of predators in a forest community
bacterial population in a petri dish
amount of minerals in the pond water
number of fish in a pond
2
If testing to see if rats have a preference out of 5 food choices, what will be the critical value in a chi-square
5.99
11.07
9.49
13.28
3
Which characteristic of life is shown here?
made of cells
use materials and use energy
homeostasis
evolve
4
In a chi-square test, your degrees of freedom:
Give you the critical value (cut-off value)
Are used to get the "expected" values
Are equal to the number of options there were
Are added together at the end to get X2
5
What kind of graph should be made from this data?
bar graph
pictograph
box and whiskers plot
line graph
6
You think that Chem-X kills bugs. Chem-X is sprayed on area A but not B. A proper hypothesis is:
If chem-X works, then you should use it
The area sprayed w/ chem-X will have more dead bugs than the other area
Chemical X kills bugs
Chemical X will have no effect on bugs
7
What kind of graph is this?
Semi-log graph
Histogram
Scatterplot
Bar graph
8
What is the dependent variable?
number of tadpoles
amount of sunlight
temperature of water
pH of water
9
What type of graph should be made for this data?
Bar graph with Week on the X
Bar graph with a bar for each trial
Line graph with separate line for each trial
Line graph with a separate line for each week
10
You are testing if rats will go to chamber A, B, or C. There are 15 rats total. Which is true?
Your expected must total 15
Your critical value is 1.99
Your degrees of freedom will be 3
Your expected will be 3 rats in each chamber
11
Which conclusion is best supported by the scatterplot?
As the length of a call increases, the cost of the call remains the same
As the length of a call increases, the cost of the call increases
There is no relationship between the length of the call and cost
As the length of a call increases, the cost of the call decreases
12
If X
2
is larger than the critical value:
A null hypothesis is accepted because there is a diff between obs and exp
A null hypothesis is accepted because there is no diff between obs and exp
A null hypothesis is rejected because there is no diff between obs and exp
A null hypothesis is rejected because there is a diff between obs and exp
13
You think that Chem-X kills bugs. Chem-X is sprayed on area A but not B. A proper null hypothesis is:
All the bugs should die in both A and B
There will be no difference in the # of dead bugs in A vs B
There should be some dead bugs in both area A and B
No bugs should die in this experiment
14
The first step in the scientific method from the options below is:
Propose a question/problem
Set up an Experiment
Form a Hypothesis
Draw a Conclusion
15
If your standard deviation is 12 and the sample size is 16, the Standard error of the mean is:
0.75
1.5
.80
3
16
If calculating standard deviation for the set: 7, 12, 14, 14, 22, 30, 6, what is Ẍ (should be a line over the x)
14
15
7
7, 12, 14, 14, 22, 30, 6
17
If data is shown with +/- 2 SEM, this means 95%:
confidence the true mean falls in that area
of data collected was outside of the range
of the data was clustered around that point
chance your experiment was valid
18
If the graphs below are showing +/- 2 SEM, between which 2 groups is thhere a statistical difference?
9 and 10
1 and 4
3 and 4
1 and 6
19
If calculating standard deviation for the set: 7, 12, 14, 14, 22, 30, 6, what is "n"
15
7, 12, 14, 14, 22, 30, 6
14
7
20
The energy in most ecosystems comes from
heat.
green plants.
the sun.
wind.
21
What kind of graph is this?
Box and whiskers
Line graph
Scatterplot
Semi-log
22
Which characteristic of life is shown here?
made of cells
homeostasis
growth and development
use materials and energy
23
You think Chem-X kills bugs. You put chem-X in area A but not B and place 10 bugs in each area
The negative control group is that they are all the same species
The side not given chem-x is a positive control group
The dependent variable is the presence or absence of Chem X
The dependent variable is whether or not the bugs die
24
If calculating standard deviation for the set: 7, 12, 14, 14, 22, 30, 6, what is x
i
7
14
7, 12, 14, 14, 22, 30, 6
15
25
If you make a graph of how many bugs die when different amounts of Chem-X are added,
The amount of chem-x added goes on the Y
The number of bugs that die go on the X
This should be a line graph
26
A measure of how clustered a set of data is around an average is:
Probability
Standard Error
Chi-Square
Standard Deviation
27
If the standard error of the mean is 1.5 and you are asked to add error bars showing +/-2 SEM:
The error bar will go up by 1.5 and down by 1.5 from the x-axis
The error bar will go up 3 and down 3 from the average
The error bar will go up 3 and down 3 from the x-axis
The error bar will go up by 1.5 and down by 1.5 from the average
28
A study is done on whether Insecticide X kills mosquitoes. Which of these would be a good NEGATIVE control group?
Mosquitoes that are a different species
Mosquitoes that are sprayed with double the amount of Insecticide X
Mosquitoes that are sprayed with water
Mosquitoes that are sprayed with a known insecticide
29
Which of these would be part of an ecosystem but not a community?
dissolved oxygen
decomposers
plants
bacteria
