Older rocks are at the bottom and younger rocks are at the top. Ian is digging in his garden, and admires the shiny pebbles sitting in the yard, as he digs a hole and finds more rocks, he knows that the first ones he found are younger or older?
younger

Increasing the number of resistors in a series circuit increases the overall resistance of the circuit. If Milo is building a new circuit and he decreases the number of resistors in a series on that circuit, what happens to the overall resistance of the circuit increases or decreases?
decreases

Richer nations use far more energy resources, especially fossil fuels, than poorer nations do. If America is a rich nation and China is a poor nation, which nation uses less energy resources China or America?
China