*Question*: Giant redwood trees change energy from one form to another. How is energy changed by the trees?
*Answer*: They change solar energy into chemical energy.

*Question*: Which model is used by scientists to determine the properties of elements?
*Answer*: the Periodic Table

*Question*: Which sequence lists the levels of organization in the human body from simplest to most complex?
*Answer*:
cell -> tissue -> organ -> organ system