⚡ Part 1: Pre-Investigation Questions

1. What do you think will happen when steel wool is connected to a 9V battery?

2. Circle the correct answer: What causes heat in electrical circuits?

The battery getting tired

Electrical resistance in the wire

The wire getting cold

Magic

3. Check all the safety equipment we should use during this investigation:

Safety goggles

Fire blanket nearby

Tweezers or tongs

Mobile phone

Teacher supervision

🔬 Part 2: Observation Record

4. Draw what you observed when the steel wool was connected to the battery:

5. Describe what happened to the steel wool during the experiment:

6. Did the steel wool get hot? Circle your answer and explain why:

Yes

No

Explanation: ________________________________________________

7. Rate the temperature change you observed (circle one):

No change

Slightly warm

Very hot

Glowing hot

🧠 Part 3: Understanding Electrical Resistance

8. Fill in the blanks using the words from the word bank:

Word Bank: resistance, heat, current, collisions, energy

When electrical __________ flows through a wire, it encounters __________. This causes __________ between electrons and atoms inside the material. These collisions convert electrical __________ into __________ energy.

9. Match the electrical components with their descriptions:

1. Battery

2. Steel wool

3. Electrical current

4. Resistance

A. Flow of electrons through a conductor

B. Opposition to current flow that creates heat

C. Provides electrical energy for the circuit

D. High resistance material that heats up quickly

10. Circle the correct answer: Why does steel wool heat up more than thick copper wire?

Steel wool has higher resistance

Steel wool has lower resistance

Steel wool conducts electricity better

Steel wool is made of copper

🏠 Part 4: Real-World Applications

11. List three household appliances that use electrical resistance to produce heat:

12. Check all the situations where electrical resistance creating heat could be:

Helpful:

Electric heater warming a room

Toaster browning bread

Hair dryer drying hair

Electric kettle boiling water

Problematic:

Computer overheating

Power lines getting too hot

Phone charger becoming warm

Car engine overheating

💭 Part 5: Reflection and Extension

13. Explain in your own words why the steel wool heated up during our experiment:

14. What safety precautions did we take during this investigation and why were they important?

15. Extension Question: How do you think the thickness of the steel wool might affect how much heat is produced? Design a simple investigation to test this: