Primary 4 Science Revision Online Free Guide Singapore Magnet (Part 1)

#pri4science #pri4syllabus #pri4tuition #pri4sciencetutor #onlinetutor

Inclusive tuition for the top ten percentile of PSLE Science students. Magnets for PSLE 2014 Science syllabus, Primary 4 Science Topic Magnets.

Call us for small group tuition. Edukate Tuition +65 88231234.

Magnets

A magnet is an object that creates a magnetic field. This magnetic field creates an invisible force of attraction or repulsion depending on the materials it interacts with.

Magnetism will attract objects made of iron, cobalt, nickel and some steel. (It must be noted that not all steel are magnetic). These are called ‘magnetic materials.’

Natural Magnets are found in rocks like lodestone, pyrrhotite, columbite and magnetite.

Artificial Magnets are man-made :

There are 3 main groups of magnets:

  1. permanent magnets- made of iron/alloys/steel and remains magnetised
  2. temporary magnets- soft iron like nails and paper clips that loses magnetism
  3. electromagnets- formed by wire coils that induce a magnetic field when electric current passes through the wires.

Magnetic Fields are invisible but can be seen using iron fillings. It can also be traced out by using a compass. Magnetic Fields are separated to its poles. We assign North and South to the opposing ends of the magnetic poles.

Magnetisation and de-magnetisation methods.

Magnetisation:

  1. single touch method
  2. double touch method
  3. electrical method

Demagnetisation:

  1. heating
  2. electrical induction
  3. heating with a hammer

Different types of magnets

  1. bar magnet
  2. horseshoe magnet
  3. cylindrical magnet
  4. ring magnet
  5. spherical magnet

Magnetic and Non-magnetic materials.

Magnetic materials will experience an attraction force to magnets. Non-magnetic materials will have no effect when it comes into a magnetic field.

Magnetic Materials are:

  1. cobalt
  2. iron
  3. nickel
  4. certain steel

Non-magnetic materials are:

  1. aluminium
  2. brass
  3. silver
  4. wood
  5. water
  6. ceramics
  7. gold
  8. paper
  9. plastic
  10. rubber

Magnetism can pass through non-magnetic materials and cannot pass through magnetic materials.

Magnets can destroy things.



Part 2 of Magnets and Magnetism Pri 4 Science Online Free Guide Singapore (Part 2)

More information on Magnets can be found here.

Yishun Primary Mathematics Tutor Small Group Singapore Tuition Centre for Secondary 1 Sec 1 Sec 2 Sec3 Sec4 Sec5 E Maths A Maths Additional Maths GCE O levels PSLE IGCSE eduKate Yishun Primary Maths Science PSLE English Pri 1 2 3 4 5 6

Yishun Primary Mathematics Tutor Small Group Singapore Tuition Centre for Secondary 1 Sec 1 Sec 2 Sec3 Sec4 Sec5 E Maths A Maths Additional Maths GCE O levels PSLE IGCSE eduKate Yishun Primary Maths Science PSLE English Pri 1 2 3 4 5 6Yishun Primary Mathematics Tutor Small Group Singapore Tuition Centre for Secondary 1 Sec 1 Sec 2 Sec3 Sec4 Sec5 E Maths A Maths Additional Maths GCE O levels PSLE IGCSE eduKate Yishun Primary Maths Science PSLE English Pri 1 2 3 4 5 6

Punggol English Math Science A Math Add Math Additional Math E Math Secondary Tuition Primary Tuition Small Group Tutor edukatesg2017-london-13156
Punggol Tutor Yuet Ling Cambridge University UK.
Punggol English Math Science A Math Add Math Additional Math E Math Secondary Tuition Primary Tuition Small Group Tutoredukatesg2017-london-13472
Cotswold and Farms, UK

Yishun English and Mathematics Tuition  English Math Tuition Small Group Tuition Centre tutor english math science primary secondary small group tuition tutor english maths science secondary primary tuition centre edukate small group add maths e maths gee o level tuition sec1 sec2 sec3 sec4 express Maths tutorial classes enrichment UWCSEA Tuition IGCSE IB Diploma Mathematics Small Group Tuiition International Studetns Singaporecropped-cropped-82cac-ba5d1-edukate_chinacropped-b1067-edukatelogoblueenglishmathscience1.jpgcropped-edukate_bedok.jpg