1. Slide the meter stick into the bracket and support on the fulcrum to set up. Make sure the screw is facing downward. Adjust the position of the bracket until you get the meter stick to horizontally balanced then tighten the screw. Record the position of the fulcrum. If it is not exactly on the 50cm mark, either the markings are not exactly centered on the meter stick or the mass is not uniformly distributed along the meter stick. Position of the fulcrum: m 2. Use a mass hanger to hang a mass on the meter stick somewhere left of the fulcrum. What happens to the meter stick if you let go

In 1859, charles darwin published the first edition of on the origin of species, which explained his observations of various groups of animals that showed great similarities but minor differences. darwin concluded that if a population of one species separates into two different populations that live in separate locations, then over the course of many generations the different populations can develop into different species. this idea predicted many future biological findings and became the basis of modern biology. darwin’s explanation for why different species exist is best described as a(n) law. theory. inquiry. hypothesis.