Which statements are true of all scientific endeavors? All scientific endeavors are time-consuming.
All scientific endeavors cost a lot of money.
All scientific endeavors are supported by evidence.
All scientific endeavors result in the support of a hypothesis.

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.