To solve this problem, we need to identify the
Independent Variable (IV) and the
Dependent Variable (DV) for each scenario. Here's a breakdown of each question:
Definitions:
-
Independent Variable (IV): The variable that is manipulated or changed by the experimenter.
-
Dependent Variable (DV): The variable that is measured or observed to see how it responds to changes in the independent variable.
Solutions:
1.
Justin wants to determine the effect of fertilizer on the growth of grass.
-
IV: Type/Amount of fertilizer
-
DV: Growth of grass
2.
Randall wants to determine if salinity has an effect on his goldfish.
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IV: Salinity level
-
DV: Health/Behavior of goldfish
3.
James wants to know the effect of studying an extra 10 minutes each day on his Biology grade.
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IV: Extra study time (10 minutes per day)
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DV: Biology grade
4.
Joelle wants to determine the effect of pesticides on the size of the apples in the orchard.
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IV: Pesticide application (type or amount)
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DV: Size of apples
5.
Billy wants to know if increasing his exercise will decrease the time it takes him to run a kilometer.
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IV: Amount of exercise
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DV: Time to run a kilometer
6.
Angel wants to know if the type of detergent has an effect on the cleanliness of her clothes.
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IV: Type of detergent
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DV: Cleanliness of clothes
7.
Madison wants to determine if the weight of the dog will have an effect on the number of puppies in the litter.
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IV: Weight of the dog
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DV: Number of puppies in the litter
8.
Zack wants to determine if the amount of time spent on social media has an effect on anxiety levels.
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IV: Amount of time spent on social media
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DV: Anxiety levels
9.
Connor wants to determine if the diet of a rat has an effect on the rats overall health (weight, bone density).
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IV: Diet of the rat
-
DV: Overall health (weight, bone density)
10.
Allison wants to determine if the deer population in the area is influenced by the coyote population.
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IV: Coyote population
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DV: Deer population
Final Answer:
\[
\boxed{
\begin{array}{ll}
1. & \text{IV: Type/Amount of fertilizer} \quad \text{DV: Growth of grass} \\
2. & \text{IV: Salinity level} \quad \text{DV: Health/Behavior of goldfish} \\
3. & \text{IV: Extra study time (10 minutes per day)} \quad \text{DV: Biology grade} \\
4. & \text{IV: Pesticide application (type or amount)} \quad \text{DV: Size of apples} \\
5. & \text{IV: Amount of exercise} \quad \text{DV: Time to run a kilometer} \\
6. & \text{IV: Type of detergent} \quad \text{DV: Cleanliness of clothes} \\
7. & \text{IV: Weight of the dog} \quad \text{DV: Number of puppies in the litter} \\
8. & \text{IV: Amount of time spent on social media} \quad \text{DV: Anxiety levels} \\
9. & \text{IV: Diet of the rat} \quad \text{DV: Overall health (weight, bone density)} \\
10. & \text{IV: Coyote population} \quad \text{DV: Deer population} \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of identifying independent and dependent variables worksheet middle school.
