magnetism & electicity
7th grade science
Terms
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- permanent magnet
- magnet made of a material that keeps its magnetism
- solar wind
- stream of electrically charged particles flowing at high speeds from the sun
- magnetic declination
- angle between magnetic North Pole and geographic North Pole
- magnetism
- attraction of a magnet for another object
- repel
- push apart
- components of electric circuit
- source of electrical energy, load (device ran by electricity), conducting wires and switch
- electromagnet
- a solenoid with a ferromagnetic core-can be turned on and off
- atom
- smallest particle of an element
- solenoid
- a current carrying coil of wire with many loops
- attract
- to pull together
- aurora borialis
- glowing region caused by charged particles from the sun-Northern Lights
- insulators
- material that does not allow electricity to flow through
- magnetosphere
- region of Earth's magnetic field confined by solar wind
- magnetic field
- area of magnetic force around a magnet
- ferromagnetic material
- material that shows strong magnetic effects- iron, nickel, cobalt
- destroying magnets
- drop several times or heat
- resistor
- a device in an electric circuit that uses electric energy as it interferes with the flow of electricity
- superconductor
- a material with no electric resistance
- electric current
- the flow of charge through a material
- conductors
- materials that allow electricity to flow through
- Van Allen belts
- 2 doughnut shaped regions 1,000-25,000 kilometers above Earth that contain electrons and protons traveling at high speeds
- magnetic domain
- region in which the magnetic fields of all atoms are lined up in the same direction
- element
- 1 of 100 basic materials that make up all matter
- electrons
- negatively charged particles in a nucleus
- compass
- device that has a magnetized needle-points to magnetic north
- resistance
- the opposition to the movement of electric charges flowing through a material
- magnetic pole
- area of magnet where magnetic effect is strongest
- nucleus
- center of every atom
- electric circuit
- a complete path through which electric charges can flown
- proton
- positively charged particles in the nucleus