6th Grade Science 2nd Semester

Which change increases the electric force between objects? Two neutral objects are moved closer together. Electrons are added to two negatively charged objects. Two oppositely charged objects are moved farther apart. The charge on two positively charged objects is reduced.

Electrons are added to two negatively charged objects.

A negatively charged rod is placed near two neutral metal spheres, as shown below. Which statement describes the charging method shown? The spheres are charged through friction. The spheres develop the same charge. Electrons move from the rod to Sphere A. Electrons move from Sphere A to Sphere B.

Electrons move from Sphere A to Sphere B.

A plastic rod becomes negatively charged when it is rubbed with a piece of wool. How does the rod become charged? Electrons move from the rod to the wool. Protons move from the rod to the wool. Electrons move from the wool to the rod. Protons move from the wool to the rod.

Electrons move from the wool to the rod.

Which ion is formed when an atom of fluorine (F) gains one electron? F-1 F-2 F+1 F+2

F-1

Shareen performs a skit to model a method of charging. In the skit, a painter shakes her hand and gets paint on her. How does the skit model a method of charging? It models induction because the painter represents a neutral object, and the paint represents electrons that are transferred through rubbing. It models conduction because the painter represents a charged object, and the paint represents electrons that are transferred through contact. It models induction because the painter represents a charged object, and the paint represents electrons that are transferred through contact. It models conduction because the painter represents a neutral object, and the paint represents electrons that are transferred through rubbing.

It models conduction because the painter represents a charged object, and the paint represents electrons that are transferred through contact.

Two balls are placed near one another and hang down, as shown below. Which conclusion is supported by this evidence? Neither ball has a charge. The balls are both positively charged. One ball is positively charged, and the other is negatively charged. Each ball has a charge, but the type of charge is unknown.

Neither ball has a charge.

Hiro rubs an inflated balloon on his hair, and his hair sticks to the balloon. As he moves the balloon away from his head, how does the electric force change? The electric force increases because the balloon loses its charge. The electric force increases because the distance increases. The electric force decreases because the distance increases. The electric force decreases because his hair loses its charge.

The electric force decreases because the distance increases.

Alfredo makes a diagram to organize his notes about charging objects. Which statement should he place in the region marked X? It does not involve touching the objects together. The objects develop opposite charges. Electrons do not move between objects. The objects have the same charge.

The objects have the same charge.

The diagram shows two charged objects, X and Y. Based on the field lines, what are the charges of the objects? X: positive Y: negative X: negative Y: neutral X: negative Y: neutral X: positive Y: positive

X: positive Y: positive

electrical force:

a force between two charged ions, objects, or particles

As the amount of charge on two objects increases, the strength of the electrical force between the objects a. increases. b. decreases. c. varies. d. remains the same.

a. increases.

An object becomes positively charged when it a. loses electrons. b. loses protons. c. gains electrons. d. gains neutrons.

a. loses electrons.

The glass is attracting the pieces of paper. What does this tell you about the charges on the glass and the paper? a. The glass and the paper have the same charge. b. The glass and the paper have different charges. c. Neither the glass nor the paper has a charge.

b. The glass and the paper have different charges.

Which statements describe the factors affecting the strength of an electrical force? Check all that apply. a. The weaker the charge on two objects, the stronger the electrical force between them. b. The stronger the charge on two objects, the stronger the electrical force between them. c. The charge of the two objects does not affect the strength of the electrical force between them. d. The closer together two objects are, the stronger the electrical force between them. e. The farther apart two objects are, the stronger the electrical force between them. f. The distance between two objects does not affect the strength of the electrical force between them.

b. The stronger the charge on two objects, the stronger the electrical force between them d. The closer together two objects are, the stronger the electrical force between them.

As the distance between two charged objects increases, the strength of the electrical force between the objects a. varies. b. remains the same. c. increases. d. decreases.

d. decreases.

Building up electric charges on a Van de Graaff generator is an example of static______ Lightning is an example of static_____

electricity discharge

Use the drop-down menu to answer the question. A student is going to produce static charge in a glass rod by rubbing it with a piece of silk. Which method of transferring charge does this image illustrate?

friction

What would make oppositely charged objects attract each other more? increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object decreasing the positive charge of the positively charged object and decreasing the negative charge of the negatively charged object increasing the distance between the positively charged object and the negatively charged object maintaining the distance between the positively charged object and the negatively charged object

increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object

______is the process of charging an object without touching it. _____is the process of charging a sphere by touching it with a charged rod.

induction conduction

Lightning is an example of______

static discharge

Why does Chelsea see sparks as she removes her clothes from the clothes dryer? conduction induction static discharge loss of protons

static discharge

electric field

the area around a charged object where the object can exert a force on other charged objects

static electricity

the buildup of electric charges on an object

static discharge:

the movement of electric charges off an object

Use the drop-down menu to complete the statement. Based on the field lines, the electric charges indicated by the question marks are_____

the same

induction:

the transfer of electric charge without direct contact

conduction:

the transfer of thermal energy or electric charge by direct contact

How do objects with the same charge interact? How do objects with opposite charges interact? How do uncharged objects interact?

they repel each other they attract each other they have no effect on each other

attract:

to pull toward

repel:

to push away from