In what way do investigations build scientific knowledge? The results of investigations lead to questions that cannot be tested.
They reflect the opinions and social values of scientists, ensuring valid information. The results of investigations lead to new questions, which lead to new investigations. They are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.
Animals breath out carbon dioxide, plants turn the carbon dioxide into carbon and release fresh oxygen as a result. The carbon goes through the rest of the carbon cycle.
