Electric Charge and Forces SWBAT describe how electric charges exert forces on each other; define an electric field; explain how objects can become electrically charged; describe how lightning occurs

Electric Charges  What is an atom? Tiny particles that make up everything. They have both negatively and positively charged particlesTiny particles that make up everything. They have both negatively and positively charged particles  Why do atoms generally have a neutral charge? The have the same number of positive and negative charges (protons and electrons)The have the same number of positive and negative charges (protons and electrons)

Forces between Charges  Unlike forces pull together, or toward each other (attractive forces)  Like forces pull apart, or away from each other (repulsive forces)

Forces between Charges  What two things affect eth electric force of an object? DistanceDistance ChargeCharge

Electric Fields and Forces  How do electric charges exert forces on one another if they don’t touch? They have fields of energyThey have fields of energy

Making Objects Electrically Charged  Charging by contact The transfer of electric charge between objects in contactThe transfer of electric charge between objects in contact  Charging by induction The rearrangement of electric charge due to the presence of an electric fieldThe rearrangement of electric charge due to the presence of an electric field

Conductors and Insulators  Insulator A material in which electric charges do not move easilyA material in which electric charges do not move easily  Rubber  Plastic  Glass  Wood

Conductors and Insulators  Conductor Materials in which electric charges can move easilyMaterials in which electric charges can move easily  Metals GoldGold SilverSilver CopperCopper

Static Charge  Static charge The imbalance of electric charge in an objectThe imbalance of electric charge in an object  Electric discharge The movement of static charge from one place to anotherThe movement of static charge from one place to another  Grounding The process of providing a path to drain excess charge into earthThe process of providing a path to drain excess charge into earth