Gr 8 Natural Sciences Ch 3.1: Friction and static electricity

What happens when you rub a balloon on your hair?

Electrons transfer from the balloon to your hair, making your hair negatively charged
Electrons transfer from the ground to the balloon, making your hair charged
Electrons transfer from your hair to the balloon, making your hair positively charged (correct)
Electrons transfer from the air to the balloon, making your hair neutral

What is the purpose of earthing an object?

To generate a large electric charge
To create a spark
To attract charged particles from the air
To safely discharge extra electrons into the Earth (correct)

What occurs during thunderstorms that leads to lightning?

Friction between particles in clouds causes a decrease in charge
Friction between particles in clouds causes a build-up of charge (correct)
Friction between particles in the Earth causes a build-up of charge
Friction between particles in the air causes a decrease in charge

What is the function of an electroscope?

To detect the presence and type of charge on an object (A) Signup and view all the answers

What is the result of a significant build-up of charge on an object?

A discharge, either through contact or across an air gap (C) Signup and view all the answers

What is the purpose of a Van de Graaff Generator?

To generate a large electric charge on a metal dome (C) Signup and view all the answers

What is the main cause of static electricity?

The movement of electrons (B) Signup and view all the answers

What is the charge of electrons?

Negative (D) Signup and view all the answers

What happens to an object when it loses electrons?

It becomes positively charged (C) Signup and view all the answers

What is the result of friction between two surfaces?

Electrons are transferred from one surface to another (B) Signup and view all the answers

What is the normal state of an object in terms of charge?

Neutral (D) Signup and view all the answers

What happens when two objects with the same charge interact?

They repel each other (A) Signup and view all the answers

What is the nucleus of an atom mainly composed of?

Protons and neutrons (D) Signup and view all the answers

What is the result of combing your hair with a plastic comb?

Your hair stands on end and produces crackling sounds (B) Signup and view all the answers

Why do sparks occur when there is a significant build-up of charge on an object?

Because the charge difference becomes large enough to cause a discharge (C) Signup and view all the answers

What happens to the excess charge when an object is earthed?

It dissipates safely into the Earth (A) Signup and view all the answers

What is the purpose of a Van de Graaff Generator?

To generate a large electric charge on a metal dome (B) Signup and view all the answers

What is the effect of a charged object on the gold foil strips in an electroscope?

They spread apart when a charged object is brought near (A) Signup and view all the answers

What is the difference between a spark and a lightning flash?

A spark occurs between two objects, while a lightning flash occurs between clouds and the Earth (B) Signup and view all the answers

What is the result of a charged object coming into contact with a conductor?

The charged object discharges its excess charge (A) Signup and view all the answers

What is the primary reason why objects become charged?

Due to the transfer of electrons (B) Signup and view all the answers

What happens when an object has more protons than electrons?

It becomes positively charged (D) Signup and view all the answers

What is the result of friction between two surfaces?

Electrons are transferred from one surface to another (A) Signup and view all the answers

Why do objects with opposite charges attract each other?

Because of the difference in their charge (B) Signup and view all the answers

What is the term for the resistance against the movement of an object resulting from its contact with another object?

Friction (A) Signup and view all the answers

What happens to an object when it gains electrons?

It becomes negatively charged (D) Signup and view all the answers

Why do objects with the same charge repel each other?

Because of the difference in their charge (D) Signup and view all the answers

What is the composition of the nucleus of an atom?

Protons and neutrons (A) Signup and view all the answers

What is the primary cause of static electricity effects?

The transfer of electrons between objects (C) Signup and view all the answers

What happens to an atom when it gains electrons?

It becomes negatively charged (B) Signup and view all the answers

Why do objects with opposite charges attract each other?

Because opposite charges are attracted to each other (B) Signup and view all the answers

What is the result of friction between two surfaces?

Electrons are transferred between the surfaces (A) Signup and view all the answers

What is the normal state of an object in terms of charge?

Neutral (B) Signup and view all the answers

What is the term for the resistance against the movement of an object resulting from its contact with another object?

Friction (C) Signup and view all the answers

What happens when two objects with the same charge interact?

They repel each other (B) Signup and view all the answers

What is the composition of the nucleus of an atom?

Protons and neutrons (A) Signup and view all the answers

What is the direction of electron transfer when a balloon is rubbed on hair?

From the hair to the balloon (A) Signup and view all the answers

What can occur when a charged object comes into contact with a metal object?

A spark and a shock (D) Signup and view all the answers

What is the purpose of an electroscope?

To detect the presence and type of charge on an object (A) Signup and view all the answers

What occurs when the charge difference between charged regions becomes large enough?

A lightning flash occurs (C) Signup and view all the answers

What is the result of a charged object being brought near the gold foil strips in an electroscope?

The strips spread apart (D) Signup and view all the answers

What is the purpose of earthing an object?

To safely discharge excess electrons (D) Signup and view all the answers

What is the primary mechanism by which a balloon becomes negatively charged when rubbed on hair?

Electrons transfer from the hair to the balloon (D) Signup and view all the answers

What is the primary reason why sparks can ignite flammable materials?

The sparks produce a high-voltage electrical discharge (C) Signup and view all the answers

What is the primary function of an electroscope in detecting static electricity?

To detect the presence of a charged object (C) Signup and view all the answers

What is the primary effect of earthing an object on the object's charge?

The object's charge becomes neutral (A) Signup and view all the answers

What is the primary mechanism by which lightning occurs during thunderstorms?

Friction between particles within clouds (D) Signup and view all the answers

What is the primary effect of a charged object on the gold foil strips in an electroscope?

The strips become charged and spread apart (C) Signup and view all the answers

What is the primary reason for the transfer of electrons during friction?

The objects have a difference in electron density. (B) Signup and view all the answers

What happens to the charge of an object when it gains more electrons than it loses?

The object becomes negatively charged. (D) Signup and view all the answers

What is the result of the interaction between two objects with opposite charges?

They attract each other. (D) Signup and view all the answers

What is the term for the force that holds the nucleus of an atom together?

Strong nuclear force. (C) Signup and view all the answers

What is the effect of friction on the movement of electrons between two surfaces?

It increases the movement of electrons. (A) Signup and view all the answers

What happens to the charge of an object when it loses more electrons than it gains?

The object becomes positively charged. (A) Signup and view all the answers

What is the result of the interaction between two objects with the same charge?

They repel each other. (A) Signup and view all the answers

What is the term for the movement of electrons between two surfaces in contact?

Electron transfer. (A) Signup and view all the answers

Gr 8 Natural Sciences Ch 3.1: Friction and static electricity

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Questions and Answers

What happens when you rub a balloon on your hair?

What is the purpose of earthing an object?

What occurs during thunderstorms that leads to lightning?

What is the function of an electroscope?

What is the result of a significant build-up of charge on an object?

What is the purpose of a Van de Graaff Generator?

What is the main cause of static electricity?

What is the charge of electrons?

What happens to an object when it loses electrons?

What is the result of friction between two surfaces?

What is the normal state of an object in terms of charge?

What happens when two objects with the same charge interact?

What is the nucleus of an atom mainly composed of?

What is the result of combing your hair with a plastic comb?

Why do sparks occur when there is a significant build-up of charge on an object?

What happens to the excess charge when an object is earthed?

What is the purpose of a Van de Graaff Generator?

What is the effect of a charged object on the gold foil strips in an electroscope?

What is the difference between a spark and a lightning flash?

What is the result of a charged object coming into contact with a conductor?

What is the primary reason why objects become charged?

What happens when an object has more protons than electrons?

What is the result of friction between two surfaces?

Why do objects with opposite charges attract each other?

What is the term for the resistance against the movement of an object resulting from its contact with another object?

What happens to an object when it gains electrons?

Why do objects with the same charge repel each other?

What is the composition of the nucleus of an atom?

What is the primary cause of static electricity effects?

What happens to an atom when it gains electrons?

Why do objects with opposite charges attract each other?

What is the result of friction between two surfaces?

What is the normal state of an object in terms of charge?

What is the term for the resistance against the movement of an object resulting from its contact with another object?

What happens when two objects with the same charge interact?

What is the composition of the nucleus of an atom?

What is the direction of electron transfer when a balloon is rubbed on hair?

What can occur when a charged object comes into contact with a metal object?

What is the purpose of an electroscope?

What occurs when the charge difference between charged regions becomes large enough?

What is the result of a charged object being brought near the gold foil strips in an electroscope?

What is the purpose of earthing an object?

What is the primary mechanism by which a balloon becomes negatively charged when rubbed on hair?

What is the primary reason why sparks can ignite flammable materials?

What is the primary function of an electroscope in detecting static electricity?

What is the primary effect of earthing an object on the object's charge?

What is the primary mechanism by which lightning occurs during thunderstorms?

What is the primary effect of a charged object on the gold foil strips in an electroscope?

What is the primary reason for the transfer of electrons during friction?

What happens to the charge of an object when it gains more electrons than it loses?

What is the result of the interaction between two objects with opposite charges?

What is the term for the force that holds the nucleus of an atom together?

What is the effect of friction on the movement of electrons between two surfaces?

What happens to the charge of an object when it loses more electrons than it gains?

What is the result of the interaction between two objects with the same charge?

What is the term for the movement of electrons between two surfaces in contact?

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