Question

name adrian sobrnanna date
independent and dependent variables scenarios
(manipulated) (responding)
scenario independent dependent

1. a cow is given a growth hormone and then compared to another cow that was not given a growth hormone. both cows were weighed at 2 years. growth hormone weight
2. mosquito repellent is sprayed on one arm and the other arm is not sprayed. the number of mosquito bites is counted after 2 hours. repellat bites
3. 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. selbility grape mass
4. two different cars are traveling at 60 mph. at a certain point, both cars slam on the brakes. the distance it takes for each car to stop is then measured. different brands distance
5. pillbugs are placed in a container where they have a choice of a wet or a dry environment. researchers record how much time was spent on each side.
6. a stapler is used to staple 100 papers, it jams 5 times during the trial. a different brand of stapler performs the same test; it jams 22 times.
7. cockroaches are exposed to a pesticide. after 3 hours, 95% of the insects are dead.

Explanation:

Step1: Identify independent variable

The independent variable is the factor that is manipulated or changed in an experiment.

Step2: Identify dependent variable

The dependent variable is the factor that is measured or observed and is affected by the independent variable.

Scenario	Independent Variable	Dependent Variable
2	Mosquito repellent (sprayed/not sprayed)	Number of mosquito - bites
3	Salinity (tap water/salt water)	Grape mass
4	Car brand	Stopping distance
5	Environment type (wet/dry)	Time spent in each environment
6	Stapler brand	Number of jams
7	Pesticide (exposure)	Percentage of dead cockroaches

Answer:

Scenario	Independent Variable	Dependent Variable
2	Repellent	Bites
3	Salinity	Grape mass
4	Car brand	Distance
5	Environment type (wet/dry)	Time spent
6	Stapler brand	Number of jams
7	Pesticide	Percentage of dead insects