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# Independent and Dependent Variables

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Studying independent and dependent variables.

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• Good explanation, but it would be more better if you have added the answer keys of the exercises.

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• this was an amazing well done slide. it reallyy helpedd!!

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### Independent and Dependent Variables

1. 1. Objective:• Identify the variables in an experiment; constants, independent, and dependent. 1
2. 2. 2
3. 3. Dependent and IndependentVariables Explained 2
4. 4. 3
5. 5. Did you know that if you can add 1+1 then you can learn today’s 3
6. 6. Did you know that if you can add 1+1 then you can learn today’s Ok…here it goes! 1+1= 2 So, I guess you’re ready! 3
7. 7. 4
8. 8. 2 + ____ =__?__What does this problemequal? 4
9. 9. 2 + ____ =__?__What does this problemequal?You’re right! It Depends… 4
10. 10. 5
11. 11. 2+2=4 5
12. 12. 2+2=4 2+4=6 5
13. 13. 2+2=4 2+4=62+50=52 5
14. 14. 6
15. 15. 2+2=4 2+4=6 2+50=52In every example, wechanged one number… 6
16. 16. 2+2=4 2+4=6 2+50=52In every example, we …and it affectedchanged one number… the answer! 6
17. 17. 2+2=4 2+4=6 2+50=52In every example, we …and it affectedchanged one number… the answer! Therefore, the answer depended on the number we changed! 6
18. 18. 2+2=4 2+4=6 2+50=52In every example, we …and it affectedchanged one number… the answer! Therefore, the answer depended on the number we changed! 6
19. 19. In every example, we …and it affectedchanged one number… the answer! Therefore, the answer depended on the number we changed! 6
20. 20. 7
21. 21. Simple, but try it! 10+__=__ 10+__=__ 10+__=__Fill in the above problems to make 3 truemath sentences. 7
22. 22. 8
23. 23. You ask… ? ? What does this ? have to do with? Science? ? ? ? ? 8
24. 24. 9
25. 25. Variables are used in Math and Science! 9
26. 26. Variables are used in Math and Science!A variable is… something that can be changed. 9
27. 27. Variables are used in Math and Science!A variable is… something that can be changed. In our math problems, the numbers we changed were called variables. 2+2=4 9
28. 28. Variables are used in Math and Science!A variable is… something that can be changed. In our math problems, the numbers we changed were called variables. 2+2=4A constant is… something that does not change. 9
29. 29. Variables are used in Math and Science!A variable is… something that can be changed. In our math problems, the numbers we changed were called variables. 2+2=4A constant is… something that does not change. In our math problems, the number we decided not to change could be called a constant. 9
30. 30. 10
31. 31. Science experiments use…Independent variables – the one factor changed by the person doing the experiment. 10
32. 32. Science experiments use…Independent variables – the one factor changed by the person doing the experiment.Dependent variables – the factor being measured in an experiment. 10
33. 33. Science experiments use…Independent variables – the one factor changed by the person doing the experiment.Dependent variables – the factor being measured in an experiment.Constants – all the factors that stay the same in an experiment. 10
34. 34. In our math problems we used independent and dependent variables too! 11
35. 35. In our math problems we used independent and dependent variables too! 11
36. 36. In our math problems we used independent and dependent variables too! 2+2=4 Constant(It stayed the same) 11
37. 37. In our math problems we used independent and dependent variables too! Independent variable (The one number we changed) 2+2=4 Constant(It stayed the same) 11
38. 38. In our math problems we used independent and dependent variables too! Independent variable (The one number we changed) 2+2=4 Dependent variable Constant (The number that depended(It stayed the same) on the independent variable) 11
39. 39. 12
40. 40. Now, how does it fit with science experiments? 12
41. 41. Now, how does it fit with science experiments?Imagine you want to do anexperiment to test what kind of plantfood works the best. Miracle Gro,Jobe sticks, or the name brand. 12
42. 42. Now, how does it fit with science experiments?Imagine you want to do anexperiment to test what kind of plantfood works the best. Miracle Gro,Jobe sticks, or the name brand. You would want to be sure that you changed ONLY what you are testing so that your results wouldn’t be messed up. 12
43. 43. 13
44. 44. Our Experiment A B CConstantsIndependentVariableDependentVariable 13
45. 45. Our Experiment A B CConstants water water water soil soil soil light light light daisy seed daisy seed daisy seedIndependentVariableDependentVariable 13
46. 46. Our Experiment A B CConstants water water water soil soil soil light light light daisy seed daisy seed daisy seedIndependentVariable Miracle Gro Jobe’s Sticks name brandDependentVariable 13
47. 47. Our Experiment A B CConstants water water water soil soil soil light light light daisy seed daisy seed daisy seedIndependentVariable Miracle Gro Jobe’s Sticks name brandDependent Plant growth Plant growth Plant growthVariable (most) (some) (very little) 13
48. 48. 14
49. 49. Our Constantsand Variables!Constants:Independent variable:Dependent variable: 14
50. 50. Our Constantsand Variables!Constants: The type and amount of dirt (same).Independent variable:Dependent variable: 14
51. 51. Our Constantsand Variables!Constants: The type and amount of dirt (same). The amount and timing of watering (same).Independent variable:Dependent variable: 14
52. 52. Our Constantsand Variables!Constants: The type and amount of dirt (same). The amount and timing of watering (same). The type and amount of light (same).Independent variable:Dependent variable: 14
53. 53. Our Constantsand Variables!Constants: The type and amount of dirt (same). The amount and timing of watering (same). The type and amount of light (same). The amount of plant food given (same).Independent variable:Dependent variable: 14
54. 54. Our Constantsand Variables!Constants: The type and amount of dirt (same). The amount and timing of watering (same). The type and amount of light (same). The amount of plant food given (same).Independent variable: The brand of plant food testing. (Miracle Gro, Jobes Stick, name brand)Dependent variable: 14
55. 55. Our Constantsand Variables!Constants: The type and amount of dirt (same). The amount and timing of watering (same). The type and amount of light (same). The amount of plant food given (same).Independent variable: The brand of plant food testing. (Miracle Gro, Jobes Stick, name brand)Dependent variable: The health and growth of the plants. 14
56. 56. Our Constantsand Variables!Constants: The type and amount of dirt (same). The amount and timing of watering (same). + The type and amount of light (same). The amount of plant food given (same).Independent variable: The brand of plant food testing. = (Miracle Gro, Jobes Stick, name brand)Dependent variable: The health and growth of the plants. 14
57. 57. Here’s How it Works! Constants Independent Dependent Variable VariableSame typesand amounts Differentof: plant Health and foods growthwater, light, of plants tested.and soil 15
58. 58. Here’s How it Works! Constants Independent Dependent Variable VariableSame typesand amounts Differentof:water, light, + plant foods tested. = Health and growth of plantsand soil 15
59. 59. 16
60. 60. Now...for any experiment, you should be able toidentify the constants, independent variables,and dependent variables just bythinking… 1+1=2 ORConstants + Independent Var. = Dependent Var. 16
61. 61. 1.) A student’s grade depends on how much she studies.Independent variable:Dependent variable:2.) The height of a plant and the amount you water it.Independent variable:__________ 17
62. 62. 3. The amount of money you make and the number of hours you work.Independent variable:__________Dependent variable: ____________4. The number of sodas you buy and the total money spent.Independent variable:__________ 18
63. 63. 5. The number of houses you can paint depends on how much time you have.Independent variable:__________Dependent variable: ____________ 19