(Q).
Given the fact that:  The upper rock layers are much younger.  Answer the question:   Sarah is looking at layers of rock on a cliff face. She can see that the rock at the very top of the cliff are older or younger?
(A).
younger


(Q).
Given the fact that:  The higher up a food chain that humans eat, the greater the levels of toxic metals they take in.  Answer the question:   Mike is studying what humans eat. Bears are higher up the food chain than mosquitoes. Therefore, if humans were to eat mosquitoes, they would likely be taking in less or more levels of toxic metals?
(A).
less


(Q).
Given the fact that:  As the Universe expands, galaxies move further and further apart.  Answer the question:   When a city contracts the distance across the city decreases or increases?
(A).
decreases