Gravity
This force pulls objects toward each other, especially towards earth.
What is Gravity
These partials carry a negative charge and move in conductors
What are electrons
The two types of magnetic poles
What are North and South
The process of charging by rubbing two objects together
What is friction
This flows through a wire to create a magnetic field
What is electric current
This term describes the area around a mass where gravitational force can be felt.
What is a gravitational field
Materials like rubber that don't allow charge to move easily
What are insulators
The invisible area around a magnet where magnetic forces exist
what is a magnetic field
Charging a neutral object by touching it with a charged oe
What is conduction
Increasing a number of loops strengthens an electromagnetic
What is the number of wire turns
Increasing this between two objects decreases the gravitational force between them
What is distance
A region where a charged object exerts force on other charges
What is an electric field
Magnetic field lines go from this pole to the pole
What is North to south
Charging a neutral object without touching it
What is induction
Using more power sources increases an electromagnet's strength
What are batteries
The gravitational force between two objects increases when this property of either object increases
What is mass
The electric force increases when this distance decreases
What is the distance between charges
These materials are attracted to magnets
what are iron, nickel and cobalt
In conductors, charges do this when exposed to a field
What is move freely
A larger one of these inside the coil makes the magnet stronger
What is an iron core
Astronauts feel weightless in space because of this condition, not the absence of gravity
What is free fall/ micro gravity
This happens when electrons move from one object to another by rubbing.
What is charging by friction
Two north poles placed near each other will do this
what is repel
When a charged rod is brought near a metal spear, this charging method occurs
What is induction
The overall strength of an electromagnet can be affected by these four variables
What are number of turns, number of dry cells, size of dry cells, and size of iron core