*Question*: Scientists use models that show the features of an atom. A scientist should use a model that
*Answer*: shows the details needed for a specific purpose

*Question*: This in turn causes the average temperature on Earth to rise. Which of the following observations supports that theory?
*Answer*: Carbon dioxide in the upper atmosphere absorbs and re-emits heat radiated from Earth's surface.

*Question*: How do decomposers obtain their food?
*Answer*:
absorbing food from dead organisms