Magnets Flashcards
Where is the magnetic force of a magnet the strongest
At the poles
What is a magnet
A magnet is any material that attracts iron and any material tha contains iron
Do two south poles that are brought together repel or attract
Repel
Does a North Pole that is brought near a South Pole repel or attract
Attract
Do two north poles that are brought near each other repel or attract
Repel
When the magnetic fields of two or more magnets overlap, what is the result
A combined field
Do magnetic field lines ever cross
No
Is the following sentence true or false? The magnetic declination of a location never changes
False
What particles of an atom have a negative charge
Electrons
Is the following sentence true or false? The domains of a magnet are arranged in the same direction
True
IsThe following sentence true or false? Every million years earths magnetic field changes direction
True
What is the definition of magnetosphere
The region of earths magnetic fields shaped by the solar wind
What is the evidence for sea floor spreading
Molten material, magnetic stripes, drilling samples
What is subduction
Process where oceanic crust sinks down beneath trench into mantle
Who’s the person who had the theory about the sea floor spreading
Harry Hess
What is the deep ocean trench
Deep underwater canyon
Where does the deep ocean trench form
Where Oceanic crust bends
What takes place at the deep ocean trench
Subduction
What is the definition of aurora
A glowing region in the atmosphere caused by charged particles from the sun
What is the definition of ferromagnetic
Material that shows strong magnetic properties
What is the definition of a permanent magnet
A magnet that keeps its magnetism for a long period of time
What can earth make magnets out of
Ferromagnetic material
Is the following statement true or false? Not all magnets are made of pure iron
True
Where is the magnetic force of a magnet strongest
At the polls/where the magnetic field lines are closest
The region of magnetic force around a magnet is known as its
Magnetic field
What are the lines called that map out the magnetic field around a magnet
Magnetic field lines
