Who here is single as a pringle stuck at the bottom of the can?

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?

This chart shows american troop strength during what conflict? a) gulf war b) korean war c) vietnam war d) world war ii

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal