Science test Fri Jan 16

Magnetism

a fundamental force from moving electric charges

Non Contact Force

a push or pull that acts on an object without physically touching it

magnet

a piece of iron (or an ore, alloy, or other material) that has its component atoms so ordered that the material exhibits properties of magnetism, such as attracting other iron-containing objects or aligning itself in an external magnetic field.

repel

to push something away, drive it back, or cause aversion

attract

cause to come to a place or participate in a venture by offering something of interest, favorable conditions, or opportunities.

iron fillings

small particles of iron produced by filing or a similar mechanical process.

magnetic field

an invisible region of influence surrounding magnets, electric currents, or changing electric fields, where magnetic forces can be detected and exerted on other magnetic materials, moving charged particles, or electric currents

magnetic field lines

imaginary lines that visually map a magnetic field, showing both its direction (where a compass's north pole points) and strength (how close the lines are), emerging from a magnet's North pole and entering its South pole as continuous, closed loops, never crossing

compass

an instrument containing a magnetized pointer which shows the direction of magnetic north and bearings from it.

dipolor

a pair of equal and oppositely charged or magnetized poles separated by a distance.

earths pulls

fundamental, invisible force that attracts any two objects with mass, drawing them towards each other, keeping us on the ground, making things fall, and holding the Moon in orbit

magnetosphere

the region surrounding the earth or another astronomical body in which its magnetic field is the predominant effective magnetic field.

electromagnet

relating to the interrelation of electric currents or fields and magnetic fields.

electric current

the flow of electric charge (like electrons) through a conductor, measured in Amperes (A), representing coulombs of charge per second, and is the fundamental movement that powers electrical devices