16. Change from a solid to a liquid involves what? evaporation or boiling of liquid water molecules.
A An increase in temperature or the vibration of molecules by adding heat to cause
B. The removal of heat causing condensation
C. The removal of heat to cause freezing of liquid
of a solid
D. Increase in temperature to conduct heat causing vibration of molecules to alter the state

D

Explanation:

because of increasing the temperature will make the molecules move faster and faster till reaching the liquid state

but in answer A it is a conversion between liquid to gas state

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.