A. a proper noun is usually more specific than a common noun
Mass- triple beam scale
Volume- graduated cylinder
Density- find the mass and the volume of the object. Divide the mass by the volume.
Hope this helps!
Waterfall, I think
Keeps going
Bilbo's indecision about whether he should go on the adventure: his determination to give it a go. The last one. I think I'm late. :/