Practicing the Scientific Method – August 30, 2021
For the following experiments, identify components indicated under the description:
1. The Effects of Using Colored-Pencils on Diagrams to Better Learn Science Terms and Processes
Mariel is upset at getting a C in her last science class. She wondered if using different colors on diagrams
and her notes would help her better recall the information on tests, and so raise her grade.
By using colored-pencils on diagrams to improve her study techniques, Mariel might be able to
Hypothesis: __________________________________________________________________
_____________________________________________________________________________
improve her grade.
The colored-pencils used by Mariel
IV: __________________________________________________________________________
DV: _________________________________________________________________________
Her grade, which will be dependent on, according to herself, the colored-pencils.
2. The Effect of point deductions for not doing Homework on time.
Dr. Fields predicted that deducting 10% of the assignment points for missing homework would lower the
amount of homework missed in anatomy class. She recorded the number of missed homework for 30 days,
then he deducted 10% of the points for each missed homework assignment and compared the numbers to
see if her policy had any effect.
Hypothesis:
______________________________________________________________________________________
By deducting missed (or late) homework by 10%, students will be more likely to submit homework or projects on time.
______________________________________________________________________________________
Independent Variable:
The 10% rate that will be given to any late assignments (not the number of days, because they do not have an effect on the DV)
______________________________________________________________________________________
______________________________________________________________________________________
Dependent Variable:
The amount of missed homework.
_____________________________________________________________________________________
What is the control group OR, if there is no such group, explain how you could change the experiment to
In order to add a control group, I would change the number of days to record the missed homework to 10, 20,
include that one: _______________________________________________________________________
and
lastly, 30 days, just as before, In this case, 30 days would be the control group because it would be a repeated value (it did not change)
______________________________________________________________________________________
3. Identify the Independent Variable and the Dependent Variable:
Independent
Variable
Dependent
Variable
Precipitation
Cucumber Yield
2. Identify the independent and dependent variables and graph the data shown below.
A survey of students’ favorite after-school activities was conducted at a school. The table below shows
the results of this survey.
Students’ Favorite After-School
Activities
Activity
range .=Highest-low
Number of Students
Play Sports
45
Talk on Phone
53
Visit With Friends
99
Earn Money
44
Chat Online
66
School Clubs
22
Watch TV
37
#
range
of items
-99-7-22=11
-
←
÷
t
80
70
60
DV
:# of
students
qq
50
"
66
30
co
%
§
37
22
10
#
talk
play
sports
on
Phone
Iv
:
Visit with
friends
After
-
Earn
money
school
Activities
chat
online
1
School
clubs
I
watch
TV
5. Based on the line graph (representing rainfall amounts), answer the following:
n
2
inches
/
a. This much rain fell in March of 1989: ____________
Around 2.7 to
3 inches
2 inches more
b. This much more rain fell in February 1990 than in February 1989: _______________.
c.
According to the graph, the driest month for both years was: ____________________
January
onths of the
d. The Independent Variable is: ______________________________________________
year
inches
e. The Dependent Variable is: ________________________________________________
Amount of rainfall
.
a.
The two activities that make up 25% of the transportation styles are:
Car clot ) ✗
_________________________
(15-1)
walking
b.
The Independent Variable in this Pie Graph would be: ____________________________________
of transportation
the
tapes
i