PLS HELP ITS DUE TODAY "Explain how empirical evidence is important to scientific investigations."

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Name the organs of humanelemintary canal.