Students learn how the human body takes in oxygen and how gas exchange occurs in the lungs.
Students learn how cells produce wastes and how the body excretes these wastes. Students learn how elements form the basic building blocks of matter, how elements are classified on the periodic table, and what atoms are made of. By the end of eighth grade, students will develop an understanding of systems, order, and organization. Students use scientific methods to determine how their level of physical activity changes the amount of carbon dioxide exhaled from their bodies. Students exhale into a bromothymol blue solution to test for the presence of carbon dioxide in their breath after they rest, walk, and then rum.