WorksheetsVariables Practice
Total questions: 20
Worksheet time: 19mins
Name
Class
Date
1.
Mr. S normally uses praise as a reward to train his dog. He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. What is his independent variable?
a)
amount of times the dog follows the command
b)
type of reward
c)
praise
d)
type of dog
2.
Mr. S. normally uses praise as a reward to train his dog. He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. Identify the dependent variable.
a)
amount of times the dog follows the command
b)
type of reward
c)
praise
d)
type of dog
3.
Mr. S. normally uses praise as a reward to train his dog. He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. What is his control trial?
a)
type of reward
b)
trials done with new rewards
c)
trials done with praise
d)
the leash that he uses
4.
Mr. S. normally uses praise as a reward to train his dog. He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. What is his control trial?
a)
type of reward
b)
trials done with new rewards
c)
trials done with praise
d)
the leash that he uses
5.
Mr. S. uses a new spray cleaner to remove green slime left by students on the lab tables. Identify the dependent variable
a)
type of cleaner
b)
the new cleaner
c)
the old cleaner
d)
the effect of the cleaners
6.
Mr. S. uses a new spray cleaner to remove the green slime left by students on the tables. Identify the control trial
a)
type of cleaner
b)
test with a new cleaner
c)
test with the old cleaner
d)
the green slime
7.
Mr. S. uses a new spray cleaner to remove the green slime left by students on the tables. Identify the independent variable.
a)
type of cleaner
b)
the new cleaner
c)
the green slime
d)
the effect of the cleaner
8.
Mr. S. wants to find the best way to get more students to attend extra help review. Normally, he does not give extra credit for attending extra help. On one quiz, he decides to give extra credit to students who attend extra help. Identify the dependent variable.
a)
extra points for attending extra help
b)
extra points for attending extra help
c)
number of students attending extra help
d)
student scores
9.
To control variables means to
a)
measure properly
b)
repeat the experiment
c)
change one thing at a time
d)
test things out for yourself
10.
At the salad bar, the grocery store charges $5.99 for each half pound you buy. Which variable is dependent?
a)
weight of the salad
b)
total cost of the salad
c)
cost of salad per pound
d)
$5.99
11.
The more time that I spend reading, the more pages I have read. Which variable is independent?
a)
number of pages
b)
time spent reading
c)
neither
d)
both
12.
A cell phone provider charges $0.15 for each text message sent and received. What is the independent variable?
a)
$.15
b)
total cost
c)
number of texts
d)
number of cell phones
13.
Which would be a qualitative observation?
a)
The color of milk
b)
The number of eggs used
c)
The temperature at which the egg boiled
d)
The time it took the egg to cook
14.
Plants that are watered daily will grow better if music is played for them daily . Which would be a controlled variable?
a)
A group of plants in a dark room
b)
A room with no plants but receives light
c)
Plants that are watered daily & receive ample light in a room with music
d)
Plants that are watered daily & receive ample light in a room with no music playing
15.
Does the temperature of water affect the time it takes a sugar cube to dissolve?
a)
IV: Type of water
DV: Dissolving rate
DV: Dissolving rate
b)
IV: Temperature of water
DV: type of sugar cube
DV: type of sugar cube
c)
IV: Temperature of Water
DV: Dissolving Rate
DV: Dissolving Rate
d)
IV: Time
DV: Number of sugar
DV: Number of sugar
16.
One way to reduce bias in an experiment is to ______.
a)
Ask girls a question about school topic
b)
Take numerical measurement of the result
c)
Use descriptive phrases as your data
d)
Make sure that the results come out the way you want them
17.
A sample that is treated exactly like the other experimental groups except that the variable is not applied to it is a(n) _______.
a)
observation
b)
variable
c)
control
d)
hypothesis
18.
Eggs were boiled at different temperatures to see how quickly they would cook. Identify the IV.
a)
cooking time
b)
different temperature used for boiling
c)
how quickly the eggs cooked
d)
the egg
19.
Butter bean seeds were placed in petri dishes lined with moist paper towel for 5 days at different temperatures & germination was measured. Which of the following is the independent variable?
a)
Number of seeds
b)
Time
c)
Temperature
d)
Type of seed
20.
Who grows taller, people who drink milk or soda? A group of 7th graders were give three cups of milk daily for two months. They were also given FF & candy for three meals a day. The second group was given three cups of soda daily for two months. They also ate healthy meals daily. At the end of two months, the groups were measured for growth.
What is wrong with this experiment?
I. The teacher was not specific with the type of soda
II. Both groups should have eaten the same type of food
III. Too many independent variables
IV. Nothing is wrong
What is wrong with this experiment?
I. The teacher was not specific with the type of soda
II. Both groups should have eaten the same type of food
III. Too many independent variables
IV. Nothing is wrong
a)
I & IV
b)
II & IV
c)
III only
d)
I, II, III
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