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Lesson 1 - Designing Experiements
Test Description: Spi 0807.Inq.1
Instructions: Answer all questions to get your test result.
1) A student designs an experiment to determine how surface type affects the amount of force needed to roll a ball 20 meters. What is the independent variable?
A
the force needed to roll the ball
B
the lengths of the surfaces
C
the type of surfaces used
D
the type of ball chosen
2) A student wants to test how the concentration of phosphorus in a fertilizer affects plant growth. In designing this experiment the independent variable would most likely be the...?
A
height each plant grows after given fertilizer
B
type of each plant used.
C
amount of phosphorus used per plant
D
type of phosphorus used.
3) Galileo was an Italian scientist who helped to develop the
A
Leaning Tower of Pisa
B
placebo effect
C
cannon
D
scientific method
4) The scientific method is a(n)
A
series of steps scientists use to answer questions and investigate problems.
B
way of dividing test subjects into two groups with one group getting a placebo
C
way to divide cells during reproduction
D
experiment done using two variables
5) A hypothesis is a(n
A
analysis of test results
B
experiment
C
tentative explanation for an observation
D
kind of placebo
6) In a controlled experiment, scientists investigate a single
A
variable
B
control
C
placebo
D
cell
7) In a double-blind test, the non-control group receives a
A
hypothesis
B
placebo
C
control
D
new medicine
8) Why is a placebo used in double-blind drug test?
A
so that people will think they are getting the medicine but are not
B
to prevent people from having side effects from the drug
C
so that the effects on people in two different groups can be compared
D
to keep the cost of the experiment down
9) What form do we use to write hypotheses?
A
control-test
B
yes-no
C
question-answer
D
if-then
10) What is the first step in the scientific method?
A
asking a question
B
conducting a controlled experiment
C
looking for more support
D
forming a hypothesis
11) What must occur for a hypothesis to be considered fully proven?
A
Public opinion must agree with the results
B
There must be specific number of controlled experiements
C
Other scientists must repeat the experiment and get the same results
D
Newspapers must report the event
12) The fake pill or medicine taken by members of a control group is a
A
placebo
B
hypothesis
C
variable
D
double-blind experiment
13) What describes data?
A
a process designed to answer a question
B
a possible explanation for an observation
C
a summary of experiment results
D
a collection of information
14) What is an independent variable?
A
variable you change in order to find out what will happen
B
step-by-step plan for an experiement
C
variable affected by changes in the independent variable
D
group that is exposed to change in the independent variable
15) What is a control group?
A
variable affected by changes in the independent variable
B
variable you change in order to find out what will happen
C
group used as a standard of comparison in an experiement
D
group exposed to changes in the independent variable
*select an answer for all questions
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