magnetism

magnetism

1. the properties of attraction possessed by magnets; the molecular properties common to magnets.

Non Contact Force

A non-contact force is a push or pull that acts on an object without physically touching it

Magnet

a body, as a piece of iron or steel, that possesses the property of attracting certain substances, as iron

repel

to drive or force back (an assailant, invader, etc.).

attract

to draw by a physical force causing or tending to cause to approach, adhere, or unite; pull (repel ).

Iron filings

small, dark-gray pieces of iron used in science education to visualize magnetic fields by aligning into patterns

• Magnetic Field

a physical force field generated by moving electric charges (like currents) or magnetic materials

Magnetic Field lines

visual representations showing the direction and strength of a magnetic field

Compass

an instrument for determining directions, as by means of a freely rotating magnetized needle that indicates magnetic north.

Dipolar

describes something having a dipole, meaning a separation of equal but opposite charges (positive and negative) across a distance, like in a molecule or magnet, creating two poles. This

Earth’s poles

: geographic (True North/South) and magnetic (North/South Magnetic Poles),

• Magnetosphere

the magnetic bubble surrounding Earth

• Electromagnet

a temporary magnet created by passing an electric current through a coil of wire, usually wrapped around a ferromagnetic core (like iron), producing a magnetic field that can be turned on/off and adjusted by controlling the current

Electric current

a flow of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is defined as the net rate of flow of electric charge through a surface.

1. All magnets are —-  They have a north and south magnetic pole.

dipolar

Without a compass, we need iron or a computer simulation to help us visualize magnetic fields.

fillings

How do the directions of the forces in the field around a magnet change?

The direction of magnetic force changes from pushing (repel) with same poles to pulling (attract) with opposite poles, with invisible "field lines" showing the path. They always go out of the north pole and into the south pole, looping around to show the direction, like tiny arrows pointing away from north and towards south.

1. How would you describe the shape of the magnetic field around the magnet?

The direction of magnetic force changes from pushing (repel) with same poles to pulling (attract) with opposite poles, with invisible "field lines" showing the path. They always go out of the north pole and into the south pole, looping around to show the direction, like tiny arrows pointing away from north and towards south.

1. How would you describe the shape of the magnetic field around the magnet1

Continuous, closed loops that emerge from the north pole, curve outwards and around to the south pole

What magnetic poles are facing each other based on the magnetic field lines below?

2nd one

How is the Earth like a magnet?

An iron inner core and spinning outer core made of liquid iron and nickel creates an invisible magnetic field, like a huge bar magnet, with a north and south pole that guides compasses, protects us from the Sun's harmful rays and helps some migrating animals navigate where they are going.

Top diagram: North and south poles - opposite poles attrac

Bottom diagram: North and north or south and south poles - like poles repel

Draw the 8 compass needle positions based on the magnet below.

The north end of a compass needle points toward the south pole of the magnet.

9. What would a compass needle do next to a south facing magnet? 

Red needle points to the south pole

10. What would a compass needle do next to a north facing magnet?

Red needle points away from the north pole aligning with the magnetic field

Red needle points away from the north pole aligning with the magnetic field

   How Distance Affects Magnetic Field Strength