University:
West Coast University
Course:
SCI 210 | Survey of Science and Technology
Academic year:

2022
Views:

256

Pages:

1
Author:

gildnar99xu

EXERCISE 7: EXPERIMENTAL VARIABLES Determine the variables tested in each of the following experiments. If applicable, determine and identify any positive or negative controls. 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 kept constant. At the end of the experiment, the number of surviving fish are surveyed. A. Independent Variable: B. Dependent Variable: C. Controls: 2. To determine if the type of agar affects bacterial growth, a scientist cultures E. coli on four different types of agar. Five petri dishes are set up to collect results: E. coli -salt agar and E. coli e with MacConkey agar and E. coli E. coli E. coli a. Independent Variable: B. Dependent Variable: C. Controls: