What is electricity and how does it work?

For an electrically charged object to repel another object, what must happen?

• The objects must touch.

• The objects must have opposite charges.

• The objects must have similar charges.

• The objects must be very light.

Tags

NGSS.MS-PS2-3

The table provided describes four different scenarios involving charged and uncharged objects. In how many scenarios will the two objects be attracted?

• 1

• 2

• 3

• 3

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

First, an electrically charged object is brought near an uncharged object. Then, the electrically charged object is brought near another electrically charged object. In which of these situations would it be reasonable to expect the object to be either attracted or repelled?

• neither

• the first situation

• the second situation

• both situations

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A balloon with an electrical charge is hung from the ceiling on a string. Another balloon is brought near it. An image is provided.

What will happen to the balloon on the string when the balloons are brought closer together?

• It will move away if the charges are the same.

• It will remain still if the charges are opposite.

• It will move away if the charges are opposite.

• It move upward if the charges are the same.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Electrically charged objects push or pull on other electrically charged objects. Two balls with varying charges are placed close to each other. In which of the following scenarios will the two balls move away from each other?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The charge of an object depends on the relative numbers of electrons and protons. For objects to attract each other, what must be true of them?

• The objects must touch.

• The objects must have opposite charges.

• The objects must be very light

• The objects must be electrically neutral.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

William rubbed a balloon across a square of carpet to give it an electric charge.

As William brings the balloon near the pieces of paper, which of the following effects is most likely?

• The paper will be attracted to the balloon if the paper and balloon have the same charge.

• The balloon will lose its charge to the paper, causing them to become very hot.

• The balloon and paper will repel each other if the charges are different.

• The paper will be attracted to the balloon if they have opposite charges.

Tags

NGSS.MS-PS2-3

A positively charged object is sitting on the floor. An image is provided.

Which of the following will most likely occur when a negatively charged object is brought near this positively charged object?

• The objects will attract each other.

• The objects will lose their charges.

• The positively charged object will be repelled.

• The positively charged object will move upward.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The fan illustrated here plugs into the wall and blows air to make a room cool.

Which of the following best explains how it works?

• It reduces heat by producing sound energy.

• It gets chemical energy from gases in the air.

• It transform electrical energy into the energy of motion.

• It spins, sending heat and light energy through its wires.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-5

Maya's teacher asked all the students to take a picture of electrical energy being transformed into light energy. Which picture will correctly meet the requirements of this assignment?

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