you have been elected as the perfect incharge of the school laboratory in your school , the senior one's are about to report for the first term .Many of these students have never heard about physics laboratory. Prepare a short speech to address the students for at least not more than 10 mins about the school laboratory

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.