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Science Ch 19, 20 L1

Review for Science Chapter 19 and Chapter 20 Lesson 1 Quiz on 5/27/14

QuestionAnswer
static charge an unbalanced negative or positive electric charge on an object
electric insulator a material through which electrons cannot easily move
electric conductor a material through which electrons easily move
polarized the condition of having electrons concentrated at one end of an object
electric discharge the process of an unbalanced electric charge becoming balanced
electric current rate at which charges pass through a given point
voltage potential difference between 2 points in a circuit
resistance opposition to the flow of electric charge
magnet any object that attracts iron
magnetic poles points on a magnet where the force is the strongest
forces push or pull
auroras formed when charged particles from the sun hit oxygen and nitrogen atoms in the air
static electricity properties particles and electric charge, gaining and losing electrons, electric discharge, electric force, electric field, attraction, and repel
current electricity properties moving electrons, conductors, resistance, current, and electric circuit
ac alternating current
dc direct current
temperature and resistance + temp, more resistance
electrodes conducting materials
electrolytes mixture of chemicals
two kinds of cells dry cells and wet cells
parts of a circuit energy source, device that transforms energy, and conducting material
electrical devices are designed to transform electric energy to kinetic energy
ex of energy source battery
ex of device that transforms energy light bulb
ex of conducting material wires
series circuit one path
parallel circuit more then 1 path
Ohm's Law when resistance increases, the voltage remains the same, there is less current
circuit breakers open circuits when current becomes too high
fuse metal that breaks a circuit
electric shock when a current passes through a body
two magnetic poles north and south
3 magnetic materials iron, cobalt, and nickel
when does attraction occur opposite forces
when does repel occur equal forces
groups of atoms i tiny areas align in magnetic domains
cutting magnets in half creates smaller magnets
kinds of magnets ferromagnet, electromagnetic, temporary magnets, and permanent magnets
ferromagnet made of iron, nickel, cobalt, or mixtures
electromagnet made by an electric current
temporary magnets made from materials that are easy to magnetize
permanent magnets difficult to magnetize and tend to keep their properties longer
Created by: 2018grellerj