A glacier moving down a mountain carves a U shaped valley in its path. Would this be a fast or slow change?

To be eligible for naturalization, an immigrant must be able to speak, read, write, and understand: a) his name b) poetry c) the constitution d) the english language

As heat and pressure increase, ductile deformation becomes less likely becomes more likely is replaced by elastic deformation stops occurring

What causes the cyclical changes in the appearance of the moon?