I want to design an experiment to see if drinking coffee makes students score higher on tests. What is the independent variable in this
experiment?

students drinking coffee

Explanation:

The dependent variable is the one that DEPENDS on what is about to happen. In this situation, whether the students scored higher DEPENDS on if they drank coffee.

So the independent variable would be the fact that they drank coffee.

Hope this helps!

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.