A student was conducting an experiment in which a heater was placed on one side of a large box and a thermometer on the other side. The student removed all the air from the box, turned
on the heater, and recorded the change in temperature. What was the student's model
designed to show?

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.