28.(Pg. [15]) From what then do you infer that they possess attraction?
29.(Pg. [15]) How do you account for some bodies being hard and others soft?
30.(Pg. [16]) What is meant by the term density?
31.(Pg. [16]) Do the most dense bodies always cohere the most strongly?
32.(Pg. [16]) How do we know that one body is more dense than another?
33.(Pg. [16]) What is there which acts in opposition to cohesive attraction, tending to separate the particles of bodies?
34.(Pg. [17]) What would be the consequence if the repulsive power of heat were not exerted?
35.(Pg. [17]) If we continue to increase the heat, what effects will it produce on bodies?
36.(Pg. [17]) What body has its dimensions most sensibly affected by change of temperature?
37.(Pg. [17]) What power restores vapours to the liquid form?