Substrand: "9.1 Magnets and electromagnets" (16 periods)

This sub-strand deals with magnets and electromagnets. Magnets exert invisible forces. The forces are strong enough to push or pull without touching. The forces are called magnetic forces. A magnet has two poles called North and South poles. A magnetic field is an area around the magnet where the force exists. Magnetic fields attract metals over a short distance only. The earth is the biggest magnet with magnetic fields attracting the compass. When magnetic fields are caused by electric currents, vice-versa. We call this electromagnetism. Electromagnets attract metals and have many uses in our lives.

Learner's should:

Learner's should:

Learner's should:

9.1.1 know that magnet has two poles and have attracting and repelling forces (k)

9.1.1.1 state that the two ends of magnets are called North (N) and South (S) pole

9.1.2 be able to show the attracting and repelling forces of magnets (s)

9.1.2.1 demonstrate using a magnet; i. like poles repel (N-N, S-S) ii. unlike poles attract (N-S, S-N)

9.1.3 be able to show that a magnetic force is a non-contact force (s)

9.1.3.1 demonstrate using iron nails to show that a magnetic force is a non-contact force

9.1.4 be able to show that magnetic field-lines are areas around the magnet (s)

9.1.4.1 demonstrate the path that a magnetic field takes around a magnet using iron filings and paper
9.1.4.2 demonstrate using the compass to show the direction of the field-lines

9.1.5 understand that the earth is the biggest magnet (u)

9.1.5.1 explain the needle of the compass always point towards the Earth’s geographical north pole (south magnetic pole)

9.1.6 be able to show that magnetic fields are caused by electricity, vise versa (u)

9.1.6.1 use a simple circuit with a compass to show that magnetic field is generated when electric current passes through

9.1.7 appreciate that electromagnets can be used in many useful appliances and equipment for our daily lives (a)

9.1.7.1 list different appliances that use electromagnet; radio, video, speakers