The magnetic field
What is that will attact magnetic materials?
MAGNET
Around 400 years ago, who shepherd called Magnets was looking after his shape
Greek
How the magnetic materials can be?
magnetised
How many poles have in magnets?
Two poles:north and south
Who discovered that a small needle of lodestone,split off the rock,could be made to float on water
The chinese
What is magnetised mean?
Magnetised means turned into a magnet
Name metals those are magnetic
nickel,cobalt ,iron
When allowed to float, what happens to lodestonne
the needele of lodestone always turned to point in the same direction
What the magnets called that you have used?
permament magnets
The rules that magnetic field lines
join opposite poles
habe arrows that point N-S
must not touch each other
must not cross each other
How magnetic north moves
very slowly, and is currently in the Arctic Ocean, north of Alaska
Why the magnets you have used called permament magnets
Because they have a magnetic field that is always there
What is the function of a compass?
can be used to detect a amgnetic field
complete the sentene:The invention of the compass was very important because it allowed people to _______ in places such as oceans and deserts, with less chance of getting lost
navigate
One way to magnetise a magnet material is by using electricity. When this method is used, the magnet is called what
electromagnet