Which number represents runoff on the hydrologic cycle diagram? 1

2

3

4
(i saw a answer on here but it had a different diagram then mines so please help ;-;)

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.

Someone me with this: a mineral' is determined by its actomic structure.

Which is an example of a vestigial structure? a: paw of a lionb: wing of a birdc: appendix of a humand: tail of a cat(i think it's a but i'm not sure)