Multiple Choice
Identify the choice
that best completes the statement or answers the question.
|
|
|
1.
|
SPI 0807.Inq.1 (Variables and Controls)-Independent
Variable
Emily and Maddie were
interested in learning what kind of drink best hydrates a person after a tough soccer game.
They decided to do an experiment using water, Coke, and Gatorade. They selected 3 identical age girls
from the soccer team that each had the same body weight. Each girl played for one hour in the
same soccer game. At the end of the game, at the same time, each girl was given one liter of
drink. Then one hour later their hydration levels were measured. Below are the results.
| Soccer
Player | Drink | Hydration
Level | | | Lauren | Water | 75% | | Christina | Coke | 66% | | Natalie | Gatorade | 88% | | | | | |
Identify the independent variable is this experiment.
a. | Ind. variable-length of the soccer
game | b. | Ind. variable-type of drink. | c. | Ind. variable-hydration level. |
|
|
|
2.
|
SPI 0807.Inq.1 (Variables and
Controls)-Independent Variable
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 force needed to roll the ball | c. | the type of surfaces used |
|
|
|
3.
|
SPI 0807.Inq.1 (Variables and
Controls)-Independent Variable
The picture below illustrates an experiment designed
to test plant growth using potted green bean sprouts placed in front of a window.
Which of these is the independent
variable in this experimental design?
a. | different types of light
sources | b. | the distance of the plants from the light
source | c. | the height of each plants ceramic
pot |
|
|
|
4.
|
SPI 0807.Inq.1 (Variables and
Controls)-Independent Variable
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. | type of each plant used. | b. | amount of phosphorus used per plant. | c. | height each plant grows after given
fertilizer. |
|
|
|
5.
|
SPI 0807.Inq.1 (Variables and
Controls)-Independent Variable
Students want to
determine which type of plant will best survive in a hot, dry environment. They place four different
types of plants in identical pots, and put all of the plants by the same large window. They give each
plant the same amount of water every day.
Which of these is the independent variable for the
students’ experiment?
a. | health of plant | b. | type of plant | c. | amount of
sunlight |
|
|
|
6.
|
SPI 0807.Inq.1 (Variables and Controls)-Independent Variable
A
student wondered if drinking an energy drink could enable you to run faster. So she asked ten 8th
grade students (5 girls and 5 boys) to act as an experimental group. Each student ran 10m as fast as
they could after drinking 355mL (12oz) of energy drink. All three trials were conducted in the gym,
and for each trial the temperature was 22.2 degrees Celsius (same as 72 degrees
Fahrenheit).
Three trials shown below
1st Trial: Day 01, Time: 8:00 A.M., run 10m after
drinking Red Bull energy drink
2nd Trial: Day 02, Time: 8:00 A.M., run 10m after drinking Monster
energy drink
3rd Trial: Day 03, Time: 8:00 A.M., run 10m after drinking Rock Star energy
drink
What was the independent variable in this experiment?
a. | The type of energy drink | b. | The amount of energy drink | c. | How fast they
ran |
|
|
|
7.
|
SPI 0807.Inq.1 (Variables and Controls)-Independent
Variable
Chase and Brandon were
interested in learning what brand of soccer ball would travel the fartherst when kicked. So they
bought three different brands of soccer balls and placed them all on the same line on the soccer
field. Then Brandon sprinted 10 meters towards each of the soccer balls, and he kicked them as hard
as he could. The results are displayed below.
| Kicker
| Soccer Ball
Brand | Distance
| | | Brandon | Adidas | 45
meters | | Brandon | Nike | 38 meters | | Brandon | Puma | 40 meters | | Brandon | Wilson | 42
meters | | | | | |
Identify the independent variable in this
experiment.
a. | Number of kicks | b. | Brand of soccer ball | c. | How hard the ball
was kicked |
|
|
|
8.
|
SPI 0807.Inq.1 (Variables and Controls)-Independent
Variable
Olivia wanted to
test how effectively three different brands of hair spray work in holding hair in place. She obtained
three brands of hair spray that each came in 16oz aerosol cans. Each morning after she had washed her
hair, she sprayed her hair with one brand of hair spray for exactly 20 seconds. Then she dried her
hair with a blow dryer, and wrote down the time.
As she went
about her business for the day she frequently observed her hair to determine if the spray was still
holding. At the first moment she noticed the spray failing to hold her hair in place, she wrote down
the time. She repeated this experiment three times with the same hair spray. Then she did the same
with a second brand for three more days. Once again she followed the exact same process with a third
brand for three final days. She put her results into the following data table
Hair Spray Brands | Hold Rate (Trial 01) | Hold Rate
(Trial
02) | Hold Rate
(Trial 03) | | NEXXUS | 6 hrs/3 min | 5 hr/ 39 min | 6 hrs/12 min | | TRESEMME | 7 hrs/32
min | 8 hrs/1 min | 7
hrs/18 min | | L’OREAL | 5 hrs/ 45
min | 6 hrs/15 min | 6
hrs/20 min | | | | |
What was the independent variable in this experiment?
a. | Brand of hair spray | b. | Type of blow dryer | c. | Hold
rate |
|
|
|
9.
|
SPI 0807.Inq.1 (Variables and Controls)-Independent
Variable
Alexis wanted to test how effectively three different
hand sanitizers kill bacteria. She squirted one gram of sanitizer from three different brands into
three different equal sized beakers which each contained an equal amount of bacteria. After 24
hours she observed that each hand sanitizer had killed most of the bacteria in each beaker. She
conducted this experiment three times. After more careful analysis she was able to put her results
into the following data table
Hand
Sanitizer | Kill Rate (Trial
01) | Kill Rate
(Trial 02) | Kill Rate
(Trial
03) | | Germ-X Brand | 98% | 99% | 97% | | Purell Brand | 94% | 95% | 92& | | Walmart Brand | 90% | 91% | 93% | | | | |
What was the independent variable in this experiment?
a. | Brand of hand sanitizer. | b. | Amout of sanitizer | c. | Bateria kill
rate |
|
|
|
10.
|
SPI 0807.Inq.1 (Variables and Controls)-Independent
Variable
Kenny and Trevor were
interested in learning what type of ball would travel the farthest when hit with a baseball bat. So
they bought 3 different types of balls, and they hit each ball with the bat as it was tossed in the
air. To make sure each ball was hit with the same amount of force, they had the same person swing the
bat each time as hard as he could. Then they measured how far each ball traveled. Their results are
displayed below.
Ball
Type | Trial 01 | Trial 02 | Trial 03 | | Baseball | 48m | 47m | 50m | | Softball | 42m | 45m | 45m | | Golf ball | 37m | 34m | 39m | | | | |
Identify the
independent variable in this experiment.
a. | Number of trials | b. | brand of the balls | c. | type of
ball |
|