1. Blood is an organic compound
2. B)
Yes, an explanation/ theory for a phenomena in science is not something that is set in stone. If experiments are done that prove the current explanation is false and this is peer checked, then the explanation can absolutely be proven false.
C) a fundamental force would be gravity
Solid- particles are packed tightly together so they don’t move much
Liquid- particles are still close together but move freely
Gas- particles are neither close together nor fixed in place
Density=mass/volume
Density=140g/100ml
Density=14g/ml