Assume that you have an unknown solution in a test tube. When you add phenol red to the test tube, it immediately turns pale yellow. This is an indication that the solution in the tube:

Fermentation in yeast can occur without:

Select all of the following that you do in the analysis phase. (choose all that apply)

The hypothesis is: “The braking distance grows linearly with speed.” What is commonly graphed on the x-axis on the graph?

In order to be of scientific value, it is important that a hypothesis should be:

What do you do in the hypothesis phase?

Select all of the following topics that belong in a scientific paper. (Choose all that apply)

The hypothesis is: “The braking distance grows linearly with speed.” What is commonly graphed on the x-axis on the graph?

A student conducted an experiment where she ground up different antacids and mixed them with water and a drop of phenol red (a pH indicator), then added drops of HCl (acid). She observed how many drops of acid it took to change the color of the phenol red from red to yellow.What is the independent variable in this experiment?

In the set-up shown in the figure below, which of the following statements describe what would be observed after 12 hours of time have elapsed?