Unit 4: Electricity, Magnetism, & Gravity

Subatomic particles with a positive charge are considered ____________________________.

• Protons

• Electrons

• Neutrons

• Megatrons

Subatomic particles with a negative charge are considered ____________________________.

• Protons

• Neutrons

• Electrons

• Megatrons

Subatomic particles with a neutral charge are considered ____________________________.

• Protons

• Neutrons

• Electrons

• Megatrons

When electric forces and magnetic forces combine, what is created?

• Electric fields

• Magnetic fields

• Electromagnetism

• Solar Power

The area around an electric charge that experiences the force exerted is called the _______________________.

• Magnetic field

• Gravity

• Electric field

• Electromagntism

Which of the following is an example of an electromagnet?

• Scrapyard Magnet Crane

• Pulley and Lever System

• Bicycle

• Steam Engine Train

Choose the STRONGEST electromagnet AND choose the best explanation for why it is the strongest electromagnet.

• 
• 
• This is the strongest electromagnet because it has a stronger gravitational force

• This is the strongest electromagnet because the wire is wrapped around the nail more

Choose the planet that has the GREATEST gravitational force AND choose the best explanation for why that planet has the greatest gravitational force.

• 
• 
• This planet has the greatest gravitational force because it is closer to the Sun

• This planet has the greatest gravitational force because it has more mass

With magnets, the opposite poles will _____________________________________.

• attract

• repel

• be absorbed

• conduct

With electric charges, the same charges will ____________________________________.

• insulate

• attract

• repel

• refract