Exercise 3: Experimental Variables Determine the variables tested in each of the

Question

Exercise 3: Experimental Variables Determine the variables tested in each of the following experiments. If applicable, determine and identify any positive or negative controls. Submit this exercise to your instructor upon completion. 1. A study is being done to test the effects of habitat space on the size of fish populations. Different sized aquariums are set up with six goldfish in each one. Over a period of six months, the fish are fed the same type and amount of food. The aquariums are equally maintained and cleaned throughout the experiment. The temperature of the water is nstant. At the end of the experiment the number of surviving fish are surveyed. A. Independent Variable: B. Dependent Variable: C. Controls:

Explanation / Answer

1. A. Independent variables: Effects of habitat space; different sized aquariums.

Explanation: The habitat space and the aquariums are fixed, so they can be considered as dependent variables.

B. Dependent variables: Fish population; goldfish.

Explanation: Fish population and goldfish are dependent on the habitat space, quality of water in the aquariums and food for their feeding. Hence, they can be categorized under dependent variables.

C. Controls: A period of six months; type and amount of food; temperature of the water; no. of surviving fish.

Explanation: The above-mentioned things, i.e. the period of time, type and amount of food, water temperature and no. of surviving fish can be controlled accordingly. So they can be categorized under controls.

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.