1Place a magnetic compass on a level surface and observe it. Which direction does the compass needle turn towards? Write your conclusion.
2Using the compass or the software in a mobile phone, find the directions at several places, then record the place, the instrument used, the object lying towards north and any remarks, and present it in class.
3Why is the Earth called a geomagnet, and why are its poles changeable?
4Write the evidence that shows the Earth has magnetism.
5In what ways does the Earth's magnetism benefit us?
6What is magnetic declination, and how is its value found?
7What is the magnetic dip, and why is its value different at the geomagnetic equator and at the geomagnetic pole?
8What is the value of the magnetic dip in Kathmandu, and what is the dip used for?
9What is the difference between the geographical meridian and the geomagnetic meridian?
10What goes wrong if the north shown by a magnetic compass is taken as the true geographic north?