The physical description would be soft due to the lava cooling the rock.
Glass as it is heavier and by newtons first law and inertia the greater the mass = more inertia(resistance to chabge in motion) thus the glass has a greater mass than an empty paper cup and thus has greater inertia. So it would be easier to leave it in place
The answer is C. It would look similar to the graph for KNO3
It's moving, in a straight line and at a constant speed. It can't be accelerating.
