âº a gradual process of change and development. âº biology Evolution is the process by which the physical characteristics of types of creatures change over time, new types of creatures develop, and others disappear. (Definition of âevolutionâ from the Cambridge Academic Content Dictionary Â© Cambridge University Press)
You can remember the difference between endotherms and ectotherms if you remember that endo- means inside endo- = inside and ecto- means outside ecto- = outside, so endotherms generate their own heat from within, and ectotherms get their heat from the outside.
The refrigerant is pushed through the expansion valve, and the temperature of the refrigerant drops -- a lot. So, that cold outdoor air is actually the warmer object then, when it comes in contact with the outdoor coil of your heat pump.And, as we know, heat likes to move from warmer objects to cooler objects.nce we get that heat from the air into the refrigerant, it's just a matter of bringing it into the house and then transferring it into your home's air. So now the mystery is solved! It's our old friend, the Second Law of Thermodynamics again. Dog photo by Tobyotter from flickr.com, used under Creative Commons license.