Testing a hypothesis can lead to one of two things: the hypothesis is confirmed or the hypothesis is rejected, meaning it either has to be changed or a new hypothesis has to be created. This must happen if the experiments repeatedly and clearly show that their hypothesis is wrong. It doesn’t matter how elegant or supported a theory is—if it can be disproven once, it can’t be considered a law of nature. Experimentation is the supreme rule in the scientific method, and if an experiment shows that the hypothesis isn’t true, it trumps all previous experiments that supported it. These experiments sometimes directly test the theory, while other times they test the theory indirectly via logic and math. The scientific method requires that all theories have to be testable in some way—those that can’t are not considered scientific theories.
If the comet were to strike the planet, the impact energy would be about 300 times that of the asteroid collision that was thought to have caused the Cretaceous-Tertiary extinction that killed the dinosaurs about 65 million years ago.
Lay the leaves to be measured on a 1-cm grid and trace their outlines. Count the number of square centimeters. Estimate the area of the partial squares. ... Do not include the area of the stem (petiole) in your calculations.
During the first week after menses (in a 28 days cycle), FSH continues to increase, the follicles grow intensely and FSH increases the expression of its own receptor and of the LH receptor on the granulosa cells.
