Unit 2; Non-contact Forces; Lessons 4-6; Grade 8

a device that uses electric currents to produce motion using permanent magnets and electromagnets

• electric forces

• electric generator

• electric motor

• electric field

opposition to the flow of electric charge

• repulsive

• resistance

• attractive

• electric charge

a magnet that is always surrounded by a magnetic field

• electric charge

• permanent magnet

• electromagnet

• electric motor

the amount of gravitational force on an object; weight is measured in newtons

• orbit

• mass

• magnetic poles

• weight

attractive or repulsive forces between magnets or attractive forces between a magnet and certain materials

• magnetic poles

• magnetic field

• magnetic forces

• electric forces

the path that an object in space follows around another object due to gravitational forces between the objects

• mass

• weight

• force field

• orbit

a property of matter that causes electrical phenomena

• electric current

• electric charge

• electric field

• electric forces

a force field created by a magnet

• magnetic poles

• magnetic field

• electric field

• magnetic forces

a model that describes what the force on an object would be if the object were placed in any location in space

• electric motor

• magnetic field

• electric field

• force field

a working model of a design solution that can be used for testing and refining the design

• prototype

• resistance

• electromagnet

• force field