C8 + C9 Review - 8 Grade

Electricity is the flow of _________.

• Protons

• Neutrons

• Electrons

What two forces are required for generators and electric motors to work? 

• magnetism and thermal 
• electricity and thermal 
• electricity and magnetism 
• magnetism and radiant 

Generators are devices that convert _____ energy into _____ energy.

• chemical; mechanical
• mechanical; electrical
• electrical; mechanical
• potential; kinetic

Like poles of a magnet do what?

• repel
• attract 
• nothing 

Unlike poles of a magnet do what?

• repel
• attract
• nothing 

What is a complete path through which electric charges can flow called?

• magnetic pole
• electric circuit 
• electric resistance
• magnetic field 

What is the force of attraction or repulsion of magnetic materials?

• electricity
• magnetism 
• energy
• electromagnetism 

What device changes mechanical kinetic energy into electrical energy?

• electric motor

• insulator

• electromagnet

• generator

What is the region of force around a magnet known as?

• magnetic field
• magnetic pole
• magnetic domain 
• lodestone

Where is the strongest force of a magnet present?

• the ends

• the middle

• its equal everywhere