Electroplating

Science Club STEAM Activity (Classes 7–8)

Theme

⚡ The Magic of Electroplating

Key Concepts

• Electroplating
• Electrolyte
• Electrodes
• Electric Current
• Corrosion Protection
• Industrial Applications

Opening Questions (5 Minutes)

Raise your hand and answer:

• Have you seen gold-plated jewellery?
• Why do some metal objects shine more than others?
• How can iron be protected from rusting?
• Can electricity coat one metal with another?
• Why are taps and bicycle parts often chromium plated?

Big Idea:

Electroplating is the process of depositing a thin layer of one metal over another using electric current. It improves appearance, prevents corrosion and increases durability.

Learning Objectives

• Understand the process of electroplating.
• Identify the role of electrolyte and electrodes.
• Explain why electroplating is useful.
• Explore real-life applications of electroplating.
• Develop scientific curiosity through experimentation.

Competencies

Competency	Evidence
Observation	Identifies electroplated objects around them.
Scientific Understanding	Explains the electroplating process.
Investigation	Observes a working electroplating model.
Critical Thinking	Analyzes advantages of electroplating.
Communication	Presents findings and observations.

Learning Outcomes

• Defines electroplating correctly.
• Identifies electrolyte and electrodes.
• Explains how electricity helps deposit metals.
• Recognizes electroplated objects in daily life.
• Explains how electroplating prevents corrosion.

Life Connect

• Gold-plated jewellery looks attractive and costs less.
• Chromium-plated taps resist corrosion.
• Bicycle parts are often electroplated.
• Tin-coated food cans protect food.
• Electroplating increases the life of metal objects.

What Does This Teach Us?

• Science improves everyday products.
• Electricity has many useful applications.
• Technology helps conserve valuable resources.
• Small improvements can create long-lasting products.

Moral Values

• Use resources wisely.
• Protect useful objects from damage.
• Appreciate scientific innovations.
• Think creatively to solve problems.
• Care for the environment by reducing waste.

MCQ Assessment

1. Electroplating is the process of:

Heating metals Depositing a layer of one metal on another using electricity Melting metals Polishing wood

2. The solution used in electroplating is called:

Catalyst Coolant Electrolyte Solvent

3. Electroplating requires:

Sunlight Electric current Wind energy Sound energy

4. Chromium plating is commonly used on:

Books Bicycle handlebars Clothes Wooden toys

5. Electroplating helps prevent:

Reflection Corrosion Refraction Magnetism

6. Food cans are often coated with:

Tin Gold Lead Silver

7. Gold-plated jewellery contains:

Pure gold throughout A thin layer of gold over another metal Plastic only Silver only

8. The object to be coated is connected to the:

Cathode Anode Switch Bulb

9. Electroplating improves:

Weight only Appearance and durability Temperature only Sound only

10. Electroplating is widely used in:

Sports only Jewellery and manufacturing industries Farming only Music only

HOTS Questions

1. Why is electroplating preferred over making an entire object from gold?

It reduces cost while maintaining appearance and protection.

2. Why are food cans coated with tin?

Tin prevents rusting and protects food from contamination.

3. How does electroplating help conserve valuable metals?

Only a thin layer of expensive metal is required.

4. What might happen if iron objects were not electroplated?

They may corrode quickly and become damaged.

5. How does electroplating support sustainable development?

It increases product life and reduces wastage of materials.

STEAM Challenge

• Working Electroplating Model
• 3D Electroplating Process Display
• Corrosion vs Electroplating Demonstration
• Gold-Plating Jewellery Model
• Electrolyte and Electrode Setup
• Industrial Electroplating Factory Model
• Tin-Coated Food Can Demonstration