Electricity

In a neutral atom, the number of electrons is equal to the number of _______.

• Neutrons
• Orbits
• Protons
• subatomic particles

Tags

NGSS.MS-PS1-1

If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that

• friction destroyed electrons in the rod.
• the silk has become negatively charged.
• protons have moved to the rod.
• glass attracts more protons.

Tags

NGSS.MS-PS2-3

If you bring a charged object near an electrically neutral surface without allowing the object to touch the surface, the charges in the surface are rearranged by

• friction.
• convection.
• induction.
• conduction.

Tags

NGSS.MS-PS2-5

Objects that have opposite charges

• are attracted to each other, and the force between the objects pulls them together.
• are attracted to each other, and the force between the objects pushes them apart.
• are repelled by each other, and the force between the objects pulls them together.
• are repelled by each other, and the force between the objects pushes them apart.  

Tags

NGSS.MS-PS2-3

Charging by ____ occurs when electrons are transferred from one object to another by direct contact.

• reduction
• induction
• conduction
• friction

The accumulation of excess electric charge on an object is called

• Static electricity 
• Electric discharge
• Resistance
• Circuit 

According to this law, a charge can be transferred from object to object, but it cannot be created or destroyed. 

• Law of Conservation of Energy 
• Newton's Third Law 
• Law of Conservation of Charge
• Ohm's Law

A material in which electrons are not able to move easily 

• Circuit 
• Insulator 
• Resistance 
• Conductor

Looking at the picture of object A and object B, one would have so say that the net charge

• before they interact is greater than the net charge after they interact.

• before they interact is less than the net charge after they interact.

• before they interact is the same as the net charge after they interact.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Lightning is _____.

• a buildup of neutrons
• harmless
• a high-voltage electric current
• a large discharge of static electricity

Tags

NGSS.MS-ESS3-2

NGSS.MS-PS2-3