What is the independent variable in an experiment testing if caffeine affects the way common house spiders build webs?
a.the number of house spiders you give caffeine to
b. the amount of food you feed the house spiders
c. the body mass of each house spider
d. the amount of caffeine the house spiders receive
The independent variable in an experiment is the variable that is manipulated to test a hypothesis. In this case, that is caffeine. In order to study the effects, they have to give different amounts to spiders
