Which of these geographic features most directly influences the climate of Nevada by limiting the amount of water vapor that can reach the state and fall as rain?
A: Sierra Nevada Mountains

How is the structure of an atom best described?
A: a positive core surrounded by mostly empty space

What is the composition of the nucleus of an atom?
A: protons and neutrons

Since 1961, Nevada has led the United States in production of which resource?
A:
gold