Question

the passage below describes an experiment. david likes cooking spaghetti. one day, his brother told him that adding salt to the water would make the spaghetti cook faster. david wanted to test this, so he set up two identical pots on the stove. to one pot, he added four cups of water and one tablespoon of salt. to the second pot, he added four cups of water and no salt. he brought both pots of water to a boil and added 10 strands of dry spaghetti to each pot at the same time. he boiled the spaghetti for five minutes. david then removed the spaghetti from each pot and tested the firmness. identify the independent variable and dependent variable in this experiment. the amount of salt in the water the firmness of the spaghetti independent variable dependent variable

Explanation:

The independent variable is what the experimenter changes or manipulates. Here, David changes the amount of salt in the water. The dependent variable is what is being measured or observed, which in this case is the firmness of the spaghetti as it may be affected by the salt - water condition.

Answer:

Independent variable: the amount of salt in the water
Dependent variable: the firmness of the spaghetti