Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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SPI 0807.Inq.1B (Variables and
Controls)-Depdendent Variable
The picture below illustrates an experiment designed by
Matthew to test plant growth using potted green bean sprouts placed in front of a
window.
Which of these is the dependent
variable in this experimental design?
a. | different types of light
sources | b. | how tall each plant grows | c. | the height of each plant’s ceramic
pot |
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2.
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SPI 0807.Inq.1B (Variables and
Controls)-Dependent Variable
Austin wants to test how the amount of sugar in one brand of
cereal affects the behavior of young children that eat that brand of cereal for breakfast.
Identify the dependent variable.
a. | the amount of cereal | b. | children’s behavior. | c. | the amount of sugar. |
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3.
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SPI 0807.Inq.1B (Variables and Controls)
Dependent Variables
A scientist investigates the effect of carbon dioxide on plant height.
The scientist grows plants in several closed containers. All the plants receive the same amounts of
water and light, but the air in each container has a different amount of carbon dioxide.
What is the responding variable (dependent variable) in this experiment?
a. | the amount of carbon dioxide in each
container | b. | the amount of water provided to the
plants | c. | the height of each plant after a period of
time |
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4.
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SPI 0807.Inq.1B (Variables and
Controls)-Dependent Variable
An engineer is designing an electrical powered robot to help
construction workers. She wants to know how much electricity will be needed for the robot to carry
both light and heavy loads a distance of 100 meters. The results of this experiment are shown in the
chart below.
Trials | Weight of Load | Amount of Electricity Used | | Trial 01 | Carried 25 pounds | 20,000
volts | | Trial 02 | Carried 50 pounds | 40, 000 volts | | Trial 03 | Carried 100
pounds | 85,000 volts | | | |
What is the dependent variable in this experiment?
a. | The number of experimental
trials | b. | The amount of electricity
used | c. | The amount of weight that was
carried |
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5.
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SPI 0807.Inq.1B (Variables and Controls)
Dependent Variables
Students design an experiment to find out if goldfish grow larger if
fewer fish live in a bowl. The students measured the lengths of seven goldfish and placed them in
identical bowls. Two goldfish were placed in Bowl one and five goldfish in Bowl two, as shown
below.
The students plan to feed the fish the same
amount of food and keep the water conditions the same for six months. Then the students will measure
the lengths of all the fish and compare their growth.
What is the dependent variable in this
investigation?
a. | length of the fish | b. | amount of food per fish | c. | number of fish per
bowl |
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6.
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SPI 0807.Inq.1B (Variables and
Controls)-Dependent Variable
Source: Teacher Created (Elliott)
A fisherman wants to
find out which kind of bait works best for catching catfish in Percy Priest lake near Nashville,
Tennessee. He uses three different kinds of bait (worms, crickets, and caterpillars). He fishes for 3
hours with each bait. He catches one catfish with the worms. He catches 5 catfish with the crickets.
He catches 3 catfish with the catepillars.
What is the dependent variable in this
experiment?
a. | The different cost for each type of
bait | b. | The number of catfish that he
caught | c. | The amount of time that he fished (3 hours
each) |
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7.
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SPI 0807.Inq.1B (Variables and Controls)
Dependent Variables
In testing the effectiveness of an energy drink on the performance of
athletes, 50 athletes were given water and 50 athletes were given a new energy drink called
“Power Up.” After drinking one can of “Power Up”, each athlete was timed
while performing a 30 meter sprint, 50-sit-ups, and 20 pull-ups.
The timed performance of
the three athletic events was the...?
a. | hypothesis for this scenario | b. | responding variable (dependent variable) | c. | conclusion of this experiment |
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8.
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SPI 0807.Inq.1B (Variables and
Controls)-Dependent Variable
A runner wants to know if drinking water before a
5-kilomenter race will help him run faster. Over a three day period he conducts three experimental
trials. Two hours before running he consumes specfic amounts of cool water.
Trials | Amount of
Water | Time to run 5 kilometers | | Trial 01 | One 12 oz bottle (355 mL) | 25
minutes | | Trial 02 | Two 12 oz bottles (710
mL | 24 minutes | | Trial 03 | Three 12 oz bottles
(1065 mL) | 21 minutes | | | |
What is the dependent variable in this experiment?
a. | The amount of water consumed | b. | The time it took to run 5 kilometers | c. | The distance of the race (5 kilometers) |
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9.
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SPI 0807.Inq.1B (Variables and
Controls)-Dependent Variable
Carmen designs an experiment to determine how surface type
affects how far a ball will roll across a variety of surfaces.
What is the dependent
variable?
a. | the lengths of the surfaces | b. | the type of ball chosen | c. | how far the ball
rolls |
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10.
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SPI 0807.Inq.1B (Variables and
Controls)-Dependent Variable
Your science teacher conducts an experiment to determine
which ink color in ballpoint pens will last the longest before running out.
---She uses 3
different ink colors in 3 ballpoint pens in a series of experiments.
---(1) Black ink pen, (2)
Blue ink pen, (3) Red ink pen)
She copies text from the science book. She copies the same
text over and over. She writes at the same speed. The room temperature remains the same during every
trial, and she writes on the same kind of paper.
What is the dependent variable in this
experiment?
a. | The text from the book | b. | The ink color | c. | How long the ink
lasts |
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