Electric Charge Worksheet
IPC • Integrated Physics & Chemistry
Electric Charge Worksheet / Hoja de Trabajo de Carga Eléctrica
Dr. Marsha Bolden
Student Worksheet • Page 1
Name / Nombre:
Period / Período:
Date / Fecha:
Goal / Meta
Describe charge and show electron transfer. Describir la carga y representar la transferencia de electrones.
Know / Saber
Electrons are (-); neutral objects are balanced; total charge is conserved. Electrones (-); neutro = equilibrado; carga se conserva.
Show / Demostrar
1. Draw electron gain. 2. Explain repulsion. 3. Source of electrons. 1. Dibujar ganancia. 2. Explicar repulsión. 3. Origen.
Section A: Bellringer and Observations / Campana y Observaciones 10 minutes
1
Does gravity need contact to pull an object toward Earth? Explain.
¿Necesita contacto la gravedad para atraer un objeto hacia la Tierra? Explica.
2
Before the demonstration, predict what a rubbed balloon will do near neutral paper.
Antes de la demostración, predice qué hará un globo frotado cerca de papel neutro.
My prediction / Mi predicción:
- - - + - + - Demonstration Model / Modelo Demostrativo
3
Watch the teacher. Write what you actually observe before making a claim.
Observa al maestro. Escribe lo que observas antes de hacer una afirmación.
Before rubbing / Antes de frotar
After rubbing / Después de frotar
Stop & Jot / Pausa y escribe: “I observed ___.” / “Observé ___.”
Dr. Marsha Bolden IPC Electric Charge • Student Worksheet Page 1 of 6
IPC Electric charge • Student worksheet
Name:
Section B: Charged Objects Lab / Laboratorio de Objetos Cargados 15 minutes
Companion record for Savvas Quick Lab: Investigate Charged Objects. Follow your teacher’s approved Savvas procedure. Registro para el laboratorio de Savvas. Sigue el procedimiento aprobado por tu maestro.
TVB 15 min • Voice 1 • Stay at station. Use only approved static materials; do not shock anyone.
4 Materials / Materiales:
5
What will stay the same across repeated trials? Choose at least two.
¿Qué mantendrás igual entre los ensayos? Elige al menos dos.
materials / materiales rubbing method / método de frotamiento separation distance / distancia de separación
other / otro:
6
Record observations. Write attract, repel, or no visible motion, then add a detail.
Registra: atraen, repelen o no hay movimiento visible. Añade un detalle.
Objects and condition / Condición
Trial 1 / Ensayo 1
Trial 2 / Ensayo 2
Like-charged objects Objetos con cargas del mismo signo
Objects:
(-) ←
REPEL
→ (-)
Charged near neutral object Objeto cargado cerca de uno neutro
Objects:
(-)→
ATTRACT
← (+ -)
If you observe a demonstration, record its results honestly if no effect is visible.
7
Think 45 sec; pair 60 sec; share one observation. / Piensa 45 s; conversa 60 s; comparte.
“The objects ; I observed .”
8
Circle the observation. / Encierra la observación.
A. The objects moved apart.
Los objetos se separaron.
B. They must have like net charges.
Deben tener cargas netas del mismo signo.
Dr. Marsha Bolden IPC Electric Charge • Student Worksheet Page 2 of 6
IPC Electric charge • Student worksheet
Name:
Section C: Read and Respond (Explain) / Lee y Responde 15 min total (C & D)
Savvas Word Lab Lesson 6.1: Read one chunk at a time. After each chunk, complete the response prompt. Use notes for your foldable.
Lee una sección a la vez y responde.
1 Chunk 1: Charge / Carga
- Electron (moves)
Electrons carry negative charge. Protons carry positive charge and remain in nuclei during these activities. Equal numbers of positive and negative charges make an object neutral.
Los electrones tienen carga negativa. Los protones tienen carga positiva y permanecen en los núcleos. Cantidades iguales = neutro.
9
An object has 4 positive charges and 4 electrons. It is .
Un objeto tiene 4 cargas positivas y 4 electrones. Es .
2 Chunk 2: Static Electricity / Electricidad Estática
Like repel • Opposite attract
Static electricity involves an imbalance of electric charge. Gaining electrons makes a neutral object negative; losing electrons makes it positive. Like net charges repel. Opposite net charges attract. A charged object can also attract a neutral object through polarization.
Desequilibrio de carga: ganar electrones = negativo; perder electrones = positivo. Mismo signo se repelen; opuestos se atraen. Carga atrae neutro por polarización.
10
A neutral object gains two electrons. It becomes because .
Un objeto neutro gana dos electrones. Queda porque .
3 Chunk 3: Conservation of Charge / Conservación de la Carga
Total charge stays constant
Charge is transferred, not created by rubbing. Track both objects: electrons lost by one are gained by the other. Total charge of the complete isolated system stays the same.
La carga se transfiere, no se crea al frotar. Electrones perdidos por uno los gana el otro. Carga total permanece igual.
11
Correct this idea: “Rubbing creates electrons.” / Corrige esta idea: «Frotar crea electrones».
Use plus/minus tokens or point to the notes, then rehearse aloud before writing. / Usa fichas de signos + y − o señala las notas; practica oralmente antes de escribir.
Dr. Marsha Bolden IPC Electric Charge • Student Worksheet Page 3 of 6
IPC Electric charge • Student worksheet
Name:
Section D: Vocabulary Organizer / Organizador de Vocabulario Explain Continued
Use during Explain: Fold a sheet into three panels or use these panels.
Añade significado, dibujo o flechas, y un ejemplo para cada término.
Picture Key / Clave Visual
+ = proton / protón − = electron / electrón
1. Electric charge / Carga eléctrica
Balanced / Equilibrado: + + + − − −
Meaning in my words / Significado en mis palabras:
Example / Ejemplo:
My picture or arrows / Mi dibujo o flechas:
2. Static electricity / Electricidad estática
Extra electrons / Electrones adicionales: + + + − − − − −
Meaning in my words / Significado en mis palabras:
Example / Ejemplo:
My picture or arrows / Mi dibujo o flechas:
3. Conservation of charge / Conservación de la carga
Before: A:4e⁻, B:4e⁻ → After: A:2e⁻, B:6e⁻
Meaning in my words / Significado en mis palabras:
Example / Ejemplo:
My picture or arrows / Mi dibujo o flechas:
Dr. Marsha Bolden IPC Electric Charge • Student Worksheet Page 4 of 6
IPC Electric charge • Student worksheet
Name:
Section E: Charge Models and Initial Claim / Modelos y Afirmación 12 minutes
12
Complete the model. Only electrons move. Start with two neutral objects, each with 4 fixed positive charges and 4 electrons. Move TWO electrons from Object A to Object B.
Solo se mueven los electrones. Empieza con dos objetos neutros (4+ y 4-). Mueve DOS electrones de A a B.
Object / Objeto
Before Transfer / Antes
After Transfer / Después
A Source / Origen
4 positive / positivas + + + +
4 electrons / electrones − − − −
Net Charge: 0 (Neutral)
4 positive / positivas (fixed)
electrons / electrones
Charge / Carga:
B Receiver / Receptor
4 positive / positivas + + + +
4 electrons / electrones − − − −
Net Charge: 0 (Neutral)
4 positive / positivas (fixed)
electrons / electrones
Charge / Carga:
Draw electron-transfer arrow from source to receiver / Dibuja la flecha.
Total e⁻ before:
Total e⁻ after:
13
“B became because it electrons from .”
«B quedó ___ porque ___ electrones de ___».
14
Begin Savvas CER: Electric Charge with an INITIAL CLAIM ONLY, after observations.
Comienza CER: Electric Charge con SOLO UNA AFIRMACIÓN INICIAL, después de observar.
Question / Pregunta:
What is the difference between charging by contact and charging by induction?
¿Cuál es la diferencia entre cargar por contacto y por inducción?
“My initial idea is because I observed .”
A tentative idea is acceptable today; you will revise it after learning induction.
Partner Check / Revisión:
Point to where B’s new electrons came from. Señala de dónde vinieron los nuevos electrones de B.
Think Tank / Pensar:
“I first thought ___. Now I think ___ because ___.”
Dr. Marsha Bolden IPC Electric Charge • Student Worksheet Page 5 of 6
IPC Electric charge • Student worksheet
Name:
Section F: Independent Learning Check / Verificación Individual 8 minutes
Work independently with your required accommodations. Trabaja de forma individual con tus adaptaciones requeridas.
1
An object starts neutral with 3 positive charges and 3 electrons. It gains two electrons. Draw its final charges and label its net charge.
Un objeto neutro tiene 3 cargas (+) y 3 electrones (-). Gana 2 electrones. Dibuja las cargas e indica la carga neta.
Drawing space / Espacio para dibujar: Final Net Charge / Carga neta final:
2
Two objects repel. Explain what this tells you about their net charges.
Dos objetos se repelen. Explica qué indica esto sobre sus cargas netas.
“They repel because .”
3
Object B gains two electrons from Object A. Explain where the electrons came from and why this does not create charge.
B gana 2 electrones de A. Explica de dónde vinieron y por qué esto no crea carga.
“B gained from . Across both objects, .”
My Self Check / Mi Autoevaluación
Show criterion / Criterio
Yes / Sí
Not yet / Aún no
I modeled electron gain and labeled the charge. / Representé la ganancia.
I explained like-charge repulsion. / Expliqué la repulsión.
I named the electron source and explained conservation. / Expliqué la conservación.
Confidence / Confianza: 0: Need help • 1: With support • 2: Independently • 3: Explain with evidence
Circle: 0 1 2 3
My revision or next step / Mi corrección:
Summary / Resumen: “Static charging happens when .”
Dr. Marsha Bolden IPC Electric Charge • Student Worksheet Page 6 of 6
Electric Charge Answer Key
Teacher Guide & Key • Clave de Respuestas
Electric Charge Answer Key / Hoja de Respuestas
IPC • Dr. Marsha Bolden
Sections A & B • Page 1 of 3
Section A: Bellringer & Observations Solutions 10 min
1 Does gravity need contact to pull an object toward Earth?
Correct Response: No, gravity does not require physical contact. It is a non-contact (field) force that acts over a distance through gravitational attraction.
Respuesta: No, la gravedad no necesita contacto; es una fuerza a distancia (campo).
2 Prediction: What will a rubbed balloon do near neutral paper?
Sample Prediction: The rubbed balloon will attract / pull / pick up small pieces of paper without touching them first. (Accept any reasoned student prediction made prior to demonstration).
Predicción: El globo frotado atraerá los trocitos de papel.
3. Demonstration Observation Table (Expected Evidence) Polarization effect
Before rubbing / Antes
Paper bits lay completely flat and stationary on desk. No movement or attraction occurs when balloon approaches.
After rubbing / Después
Paper bits jump upward, dance, stick to the balloon surface, and some may repel away after touching.
Stop & Jot Model: “I observed that the rubbed balloon pulled the paper pieces toward itself without touching them first.”
Section B: Charged Objects Lab Solutions 15 min
4. Materials / Materiales: Balloons, wool cloth/fur, plastic rods, string, small bits of tissue paper.
5. Controlled Variables (Select ≥ 2):
Rubbing method Separation distance Material types Number of rubs
Condition / Condición
Expected Trial 1
Expected Trial 2 (Repeated)
Like-charged objects (e.g., Two wool-rubbed balloons)
REPEL / Se repelen Push apart / move away
REPEL / Se repelen Consistent push at set distance
Charged near neutral (e.g., Rubbed balloon near paper/can)
ATTRACT / Se atraen Pulls toward balloon
ATTRACT / Se atraen Attracted via polarization
7. Sentence Frame Exemplar:
“The objects pushed away from each other; I observed a noticeable gap form between the two balloons without contact.”
8. Observation vs. Inference:
Correct: A. The objects moved apart.
Option B is an inference/explanation, not a direct sensory observation.
Teacher Tip for High-Humidity Days: If static charges leak quickly, wipe plastic rods with rubbing alcohol or use a hairdryer to dry balloons and cloths immediately before class.
