Question

As scientist conducting an experiment you need to have an experimental group and a control group for testing a hypothesis .if you were a scientist and with the knowledge you have what kind of hypothesis would you test? Provide an example of an experiment you might conduct.who would be in your control/experimental group?

Answer 1

ANSWER :

let us conduct a simple experiment that iodine reacts with starch to get blue black colour

experiment:

* Take two test tubes , in one test tube add a small amount of starch powder and then dissolve in water and in another test tube take glucose solution or water as control

* To the Test tube having starch solution( experimental group) add few drops of iodine solution and to the another tube having glucose solution or water( control group) also add iodine drops

  * Now observe the colour change in both test tubes

observation: In test tube having starch solution , we can observe the colour change i.e, blue black and ther is no colour change in another test tube having glucose solution or water.

Result : Iodine reacts with starch to get blue black colour , there is no reaction between glucose or water with iodine so,there is no colour change.