*Question*: Which form of energy are x rays and ultraviolet light? OPTIONS:
- nuclear
- heat
- electromagnetic
- chemical
*Answer*: electromagnetic

*Question*: What is the basic unit of life? OPTIONS:
- atom
- cell
- element
- nucleus
*Answer*: cell

*Question*: Which nongaseous compound can be made from two elements that are gases at room temperature? OPTIONS:
- water
- table salt
- iron oxide
- carbon dioxide
*Answer*:
water