*Question*
If vanes rotating in an electric fan causes nitrogen and oxygen to move, then what moves because of vanes rotating in an electric fan? Answer choices: - nitrogen and oxygen - sun rays - microwaves - some mammals - living things - animals with backbones - kinetic energy - neutrons
**Answer**
nitrogen and oxygen

*Question*
If most people can survive only a few days away from earth, then what can most people survive only a few days away from? Answer choices: - earth - wetland - friends - mines - buildings - death - family - Cancer.
**Answer**
earth

*Question*
If refrigerators help prevent cold food from growing poisonous bacteria, then what prevents cold food from growing poisonous bacteria? Answer choices: - Dehydration - Cooking - a hydraulic system - sweating - refrigerators - fur and fat - an electric stove - hard outer covering
**Answer**
refrigerators

*Question*
If having nutrients has a positive impact on an organism 's health, then having _ has a positive impact on an organism 's health? Answer choices: - malnutrition - oysters - Energy. - exercise - Cooking - nutrients - pathogens - toxins
**Answer**
nutrients