It all depends how fresh the study guide is for you. If you go through the study guide and find alot of it difficult you may need to spend a couple weeks. Expand deeper into subjects in the study guide. The science portion on the test is mainly physical science, periodic table, punnet squares, kinetic energy, balancing electrons, animal kingdom, understanding bonds etc. This test is a huge factor in you getting into the nursing program. Focus and put in 100 percent. Watch YouTube videos on things you need a refresher on.