Question

In an experiment studying the effects of acid rain on pond water, which

of the following could be the control?
a. a container of vinegar to represent the acid
b. the pond
c. a container of pond water with nothing added to it
d. a container of pond water with acid added to it
I’

Answer 1

my prediction is maybe, d. a container of pond water with acid added to it.

Step-by-step explanation:

because if you say the effects of acid rain on pond water, you can try that kind of experiment to find your product.