What is the smallest unit of an element that still has the properties of that element?
A: an atom

Which invention has technology that helps people keep food fresh for a long period of time?
A: refrigerator

Fossil fuels were formed from
A: the remains of living things

Over time, non-volcanic mountains can form due to the interaction of plate boundaries. Which interaction is most likely associated with the formation of non-volcanic mountains?
A:
continental plates colliding with continental plates