Problem 1 :
Does heating a cup of water allow it to dissolve more sugar? Temperature of the water is measured in degrees Centigrade. Amount of sugar is measured in grams.
Problem 2 :
Does heating a cup of water allow it to dissolve more sugar? Temperature of the water is measured in degrees Centigrade. Amount of sugar is measured in grams.
Problem 3 :
How old is Michael's father if he is 5 more than 3 times as old as Michael ?
Problem 4 :
Sachin saves $x every day. How much does he save in one week ?
Problem 5 :
Cora is hosting a potluck dinner for her book club. The number of chairs she will need depends on the number of members who attend.
c = the number of chairs
Cora will need
m = the number of members who attend the potluck
Which of the variables is independent and which is dependent ?
Detailed Answer Key
Problem 1
:
Does heating a cup of water allow it to dissolve more sugar? Temperature of the water is measured in degrees Centigrade. Amount of sugar is measured in grams.
Solution :
Here ,
Independent variable = temperature
Dependent variable = quantity of sugar dissolving
Problem 2 :
Does heating a cup of water allow it to dissolve more sugar? Temperature of the water is measured in degrees Centigrade. Amount of sugar is measured in grams.
Solution :
Here ,
Independent variable = temperature
Dependent variable = quantity of sugar dissolving
Problem 3 :
How old is Michael's father if he is 5 more than 3 times as old as Michael ?
Solution :
Here ,
Independent variable = Michael's age
Dependent variable = Michael's father's age
Problem 4 :
Sachin saves $x every day. How much does he save in one week ?
Solution :
Here ,
Independent variable = Every day's saving
Dependent variable = His one week saving
Problem 5 :
Cora is hosting a potluck dinner for her book club. The number of chairs she will need depends on the number of members who attend.
c = the number of chairs Cora will need
m = the number of members who attend the potluck
Which of the variables is independent and which is dependent ?
Solution :
Since the number of chairs Cora will need depends on the number of members who attend the potluck, the number of chairs is the dependent variable. So, c is the dependent variable.Since the number of members who attend the potluck does not depend on the number of chairs Cora will need, the
number of members is the independent variable. So, m is the independent variable.
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Independent & Dependent Variables
I have found my students have a great deal of difficulty with the concept of independent and dependent variables. Newer textbooks will now call these variables “manipulated and responding” but that still doesn’t seem to make it easier for students to identify which is which. No matter how many examples I give them, how many labs, how many graphs, my students will get these questions wrong, particularly on multiple choice tests where there are choices meant to distract the student.
This worksheet was designed as a way to get students to quickly read and identify the variables in a scenario. Each scenario is only a couple sentence long, such as ” One grape is placed in tap water and another grape is placed in salt water. The change in their mass is measured after a day. ” In the chart, students would identify the independent variable as the type of water and the dependent variable as the mass of the grapes.
The worksheet is made very simple, to be practice just about those variables and not other aspects of the scientific method. For differentiation, I also have a Bee version (low level) of the worksheet that gives multiple choice options. This version may also be useful for test preparation with other groups.
Grade Level: 8-10
Time Required: 15-20 minutes
Download PDF Google Doc Key (TpT)