3E3 SCIENCE BLOG

1)Our skin turns darker under the sun light because our body prevents our skin from breaking down. Our hair gets lighter because sunlight breaks down molecular surfaces on our hair 2)The oil in vegetables are actually stored in plants for energy. Vegetables do have fat in them, but healthier than oil from fats. 3)The cockroach can survive almost on anything, it can also survive after a nuclear bomb!The cockroach can live up to a week without dying and without its head, it cannot eat or drink and dies. Cockroaches breath through spiracles which are in each body segment and the blood does not carry oxygen to the tissues. The spiracles deliver air to each cell of the body through a set of tubes called tracheae. The brain does not control the breathing through the spiracles. The cockroach does not have blood pressure in the head like a mammal does and so cutting off the head does not lead to uncontrolled bleeding. Gordon