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