Question

leah, larenda, and gabi decide to test what factors influence water absorption by an egg. they remove the shell from 3 eggs by dissolving them in vinegar. they create three different water solutions. one is pure, 100% distilled water, a second is 50% water/50% corn syrup, and the third is 100% corn syrup. the mass of each egg is measured before they are put into a single solution for 24 hours. the mass of the eggs is then measured, and the data recorded below:
in this experiment, the independent variable they are testing is...

type of solution	starting mass	ending mass	change in mass
50/50 mixture	62.0 g	52.2 g	-9.8 g
100% corn syrup	66.7 g	48.9 g	-17.8 g

a. change in the mass of the eggs
b. the ending mass of the eggs
c. the amount of time they were in the solution
d. the type of solution the egg is place in

Explanation:

An independent variable is what is changed in an experiment. Here, the students change the type of solution (distilled water, 50/50 mixture, 100% corn - syrup) the eggs are placed in. The mass changes (starting, ending, change in mass) are dependent variables, and the time in the solution is a controlled variable.

Answer:

D. the type of solution the egg is placed in