By Richard Terwilliger. This means there are an equal number of electrons and protons The electroscope starts out neutral.

Slides:



Advertisements
Similar presentations
Whos right? A metal is always charged because its free electrons can run around If you put a positively charged rod near the wires their positive charges.
Advertisements

Charging by Conduction
I’m COOL! And very SMART! Bet you don’t know how to charge a pith ball by INDUCTION.
WOW! This sounds like fun. in static electricity positive charges move!
Initially, each object is neutral (i.e. each has = numbers of protons & electrons)
Electroscopes Particle picturesCharge
Atoms are composed of Electrons – fundamental negatively charged (-) particle of matter (-1.6 x10-19C) 2. Protons – fundamental positively charged (+)
PS-6.5 How can objects acquire a static electric charge through friction, induction, and conduction.
Electricity. Electrical Charge and Forces  Electrical charge is the property that causes protons and electrons to attract or repel one another.  There.
Electrical Charge is all about ELECTRONS! A gain of electrons causes a negative charge. A loss of electrons causes a positive charge.
Permanently Charging the Electroscope By conduction Using a Positively Charged Rod title.
Permanently Charging the Electroscope By conduction Using a Negatively Charged Rod title.
10.2 Charging By Contact and By Induction (Pages ) Homework: Page 417 # 2-5, 7, 8 Key Concepts: (Page 417)
Part 2 of the Static Electricity lab Determining what charge is on the rod or strip.
Electrostatics Review. What happens when a rubber rod is rubbed with a piece of fur, giving the rod a negative charge? 1.Protons are removed from the.
Aim: How can we explain electrostatics? Do Now: Why is it that when you walk on a carpeted surface with socks on, this happens:
Electrostatics Electrostatics The study of electrical charges that can be collected and held in one place. The study of electrical charges that can be.
A Styrofoam cup is hanging by a thread. A person wants to know if the cup is charged. The person brings a charged object near the cup. The object attracts.
Charge Charge Transfer 1 TOC Charging by Friction (Triboelectric Table) Charging by Contact Charging by Induction Dipole Attraction.
Get a board a marker and a wipey thing Neutral objects always have equal numbers of which subatomic particles?
Charging by Contact You can charge a neutral object by rubbing it with a different material (friction). 2.Sometimes, you can charge an object just.
Charging by Induction.
STATIC ELECTRICITY II: Charging neutral objects. S Construct one or more electrostatic apparatus and explain how they function using the particle.
Permanently Charging the Electroscope By Induction Using a Positively Charged Rod title.
Electricity Electrostatics and Fields. Electric Charges electricity comes from the Greek word elektron, which means amber. Amber is petrified tree resin.
Electroscope Lab. Before the Lab What did the leaves look like?  Hanging straight down. What is making them stay in that position?  Gravity.
Electric charge is a fundamental property of matter, like mass. Electric charge is a fundamental property of matter, like mass. Objects are either positive,
Physics Unit 4 Electricity and Magnetism. 2 Forms of Electricity 1.Static – a build up of charge on an object 2.Current – a steady flow of electric charge.
STATIC ELECTRICITY Electric charge 12 p+ Atoms are neutral Same # of protons as electrons.
1 The Electrical nature of mater STATIC ELECTRICITY.
CHARGING BY INDUCTION & CONDUCTION. STARRING THE ELECTROSCOPE.
19.1 Notes  Atoms & Charge  Remember, all matter is made up of atoms and atoms are made up of smaller particles!  Protons – have a positive charge 
Electricity You Light Up My Life!. Static Electricity Who hasn’t rubbed a balloon on their hair and stuck it to the wall?  Buildup of charge (static,
Electricity Section 1: Electric Charge and Static Electricity.
Electron Affinity How much does a material love electrons? Which had greater electron affinity? – Plastic rod & animal fur Plastic rod – Glass rod & animal.
The magnitude of the charge on the proton is equal to the charge on the electronThe magnitude of the charge on the proton is equal to the charge on.
Mechanisms for Transfer of Charge Restless Electrons.
ELECTRICITY. 1. Electric Charge  Atoms are made up of 3 particles –Neutrons have a neutral charge. –Protons have a positive charge. –Electrons have a.
Electric Charge IPC NOTES. ELECTRIC CHARGE static electricity – the net accumulation of electric charge or electrons on an object.
Electric Charge and Static Electricity
Chapter 12 ELECTRIC CHARGE.
Electrostatics ELECTROSTATICS. History J.J. Thomson – discovered negatively charged particles which he called electrons Ernest Rutherford – discovered.
Ch Electricity I. Electric Charge I. Electric Charge (p )  Static Electricity  Conductors  Insulators  Electroscope.
Electrostatics Electrostatics deals with electric charges at rest, or static electricity.
Hosted by Your Phriendly, Phun Physics Teacher Charges Electrostatics Methods of charging Properties
Electroscopes and Charges. Charge Distribution One of these isolated charged spheres is copper and the other is rubber. The diagram below depicts the.
Law of attractive forces Opposites attract Likes repel 7.1.
Electric Charge & Force Static Electricity. Electric Charge An electrical property of matter that creates a force between objects Ex. When you get shocked.
Electric Charge & Static Electricity. How do Charges Interact? Atoms contain charged particles called electrons and protons. The charge on a proton is.
Electric Charge & Static Electricity. Electric Charge The electric charge of an object is determined by the atoms that make up the object. a Physical.
15.1 Electric Charge and Current pp Mr. Richter.
Introduction to Electricity. I. Electric Charge and Static Electricity A. Electric ChargeA. Electric Charge –1. What it is a. matter is made up of atoms.
A LEAF ELECTROSCOPE.
Electroscopes.
Charging by Contact: CONDUCTION
Charging by contact Friction, Conduction.
Electrostatics Movement of charges.
Charging by Induction.
Mechanisms for Transfer of Charge
Mechanisms for Transfer of Charge
A Model for the Electrical Nature of Matter
Transient Charging by Induction.
Ch Electricity I. Electric Charge (p ) Static Electricity
Electric Charge.
Charging by Contact: CONDUCTION
Electroscopes S Explain electrostatic phenomena using the particle model of electricity.  
Aim: How do we explain the transfer of electric charge?
Electricity Electric Charge.
Presentation transcript:

by Richard Terwilliger

This means there are an equal number of electrons and protons The electroscope starts out neutral

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. Rubber rod We will charge this electroscope net negative using a negatively charged rubber rod.

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

Created by Richard J. Terwilliger April 2001 As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod by Richard Terwilliger

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves. We will charge this electroscope net negative using a negatively charged rubber rod. Rubber rod

Therefore the knob is now net positive and the leaves are net negative The knob of the electroscope lost electrons. Rubber rod The leaves gained the electrons. F es F

The electroscope hasn’t lost or gained electrons so it is still neutral. Rubber rod What would happen if the rod is taken away?

Rubber rod

by Richard Terwilliger

Rubber rod by Richard Terwilliger

Rubber rod

by Richard Terwilliger

Rubber rod

The electroscope hasn’t lost or gained electrons so it is still neutral. Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope. When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

Rubber rod The electroscope is now NET NEGATIVE. The electroscope has GAINED electrons.

by Richard Terwilliger