Conductors and Insulators

Lab Brief #7

🎯 Your mission

Run the experiment. Find out what really happens.

⚡ The twist

The opposite of what you expect is often what happens.

What you'll learn

Metals let current pass because their electrons can move; plastic, wood, glass and rubber do not. That is exactly why wires are copper inside and plastic outside — one carries the current, the other keeps it where it belongs.

Key words

conductor
A material that lets electric current pass through it.
insulator
A material that does not let electric current pass.

Make a hypothesis first

Predict: what happens if you double the force?

Say your guess out loud — then find out if you were right.

Get ready

🧰 What you need

cell
bulb and holder
leads
test materials

⚠️ Safety first

Low-voltage cell only, and never test anything plugged into the mains.

Step 1 of 4 · Read

Think about what you just learned: say what "conductor" and "insulator" mean in your own words before you start.

Step 2 of 4 · Do

Put a gap in a working circuit and bridge it with ten different materials in turn. Record which light the bulb and sort them into conductors and insulators.

Step 3 of 4 · Observe

Record what actually happened, including anything that did not match what you expected.

Step 4 of 4 · Record

Write a conclusion that answers the question this lesson opened with, and state your uncertainty.

Question 1 of 2

Which is an electrical insulator?

How sure are you?😐 maybe

Question 2 of 2

Wires have a plastic coating in order to:

How sure are you?😐 maybe

Mind = blown

🎢 You feel weightless on a roller coaster because you and the seat are falling at the same speed.

Nice work!

You got 0 of 2 right.

Next: Weight Changes, Mass Does Not All lessons

🎯

Next Smart Experiment

We'll pick an experiment that matches exactly how you're thinking right now.

✨ More to explore

🌍 Where you see this in real life: You use this every time you flip a light switch, ride a bike, or kick a ball.

🏆 Stretch challenge (try it this week): Time how long a small ball rolls down something, then change the slope and try again.

👨‍👩‍👧 For the dinner table: “Show me something at home that uses this kind of energy.”

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