1. What are the major organs of the circulatory system?2. Where does diffusion occur in the circulatory and respiratory systems? 3. How do the circulatory and respiratory systems work together to transport
gases to all parts of the body?
4. How does the excretory system remove vastes from the blood of the
circulatory system?

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.