Question

1. justin wants to determine the effect of fertilizer on the growth of grass. iv:__ dv:__
2. randell wants to determine if salinity has an effect on his goldfish. iv:__ dv:__
3. james wants to know the effect of studying an extra 10 minutes each day on his biology grade. iv:__ dv:__
4. joelle wants to determine the effect of pesticides on the size of the apples in the orchard. iv:__ dv:__
5. billy wants to know if increasing his exercise will decrease the time it takes him to run a kilometer. iv:__ dv:__
6. angel wants to know if the type of detergent has an effect on the cleanliness of her clothes. iv:__ dv:__
7. madison wants to determine if the weight of the dog will have an effect on the number of puppies in the litter. iv:__ dv:__
8. zack wants to determine if the amount of time spent on social media has an effect on anxiety levels. iv:__ dv:__
9. conner wants to determine if the diet of a rat has an effect on the rats overall health (weight, bone density). iv:__ dv:__
10. allison wants to determine if the deer population in the area is influenced by the coyote population. iv:__ dv:__

Explanation:

Step1: Recall definitions of IV and DV

Independent Variable (IV) is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable (DV). Dependent Variable (DV) is the variable being tested and measured in an experiment.

Step2: Analyze Scenario 1

Justin changes the amount of fertilizer. So, IV: Fertilizer; DV: Growth of grass

Step3: Analyze Scenario 2

Randell changes the salinity. So, IV: Salinity; DV: Condition of goldfish

Step4: Analyze Scenario 3

James changes the study - time. So, IV: Studying an extra 10 minutes each day; DV: Biology grade

Step5: Analyze Scenario 4

Joelle changes the use of pesticides. So, IV: Pesticides; DV: Size of apples

Step6: Analyze Scenario 5

Billy changes the amount of exercise. So, IV: Amount of exercise; DV: Time to run a kilometer

Step7: Analyze Scenario 6

Angel changes the type of detergent. So, IV: Type of detergent; DV: Cleanliness of clothes

Step8: Analyze Scenario 7

Madison changes the weight of the dog. So, IV: Weight of the dog; DV: Number of puppies in the litter

Step9: Analyze Scenario 8

Zack changes the amount of time on social media. So, IV: Amount of time spent on social media; DV: Anxiety levels

Step10: Analyze Scenario 9

Conner changes the diet of the rat. So, IV: Diet of the rat; DV: Overall health (weight, bone density) of the rat

Step11: Analyze Scenario 10

Allison changes the coyote population. So, IV: Coyote population; DV: Deer population

Answer:

1. IV: Fertilizer; DV: Growth of grass
2. IV: Salinity; DV: Condition of goldfish
3. IV: Studying an extra 10 minutes each day; DV: Biology grade
4. IV: Pesticides; DV: Size of apples
5. IV: Amount of exercise; DV: Time to run a kilometer
6. IV: Type of detergent; DV: Cleanliness of clothes
7. IV: Weight of the dog; DV: Number of puppies in the litter
8. IV: Amount of time spent on social media; DV: Anxiety levels
9. IV: Diet of the rat; DV: Overall health (weight, bone density) of the rat
10. IV: Coyote population; DV: Deer population