Conduction, Convection and Radiation

Lab Brief #2

🎯 Your mission

Predict it first. Then prove yourself right (or wrong).

⚡ The twist

Nature loves to surprise the careful watcher.

What you'll learn

Conduction passes energy through a solid by particle collisions and free electrons. Convection carries it in a fluid as warmer, less dense regions rise. Radiation needs no medium at all — it is infrared electromagnetic waves, which is how the Sun heats Earth across empty space.

Key words

conduction
Energy transfer through a material by particle collisions and free electrons.
convection
Energy transfer in a fluid by the bulk movement of warmer, less dense regions.

Make a hypothesis first

Before you start: write down what you think will happen, and why.

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

Get ready

🧰 What you need

metal rod
plastic rod
wax
pins
beaker
potassium permanganate
two cans
thermometer

Get ready

⚠️ Safety first

Potassium permanganate stains skin and clothing — wear gloves and goggles.
Handle hot rods and cans with tongs or a cloth.

Step 1 of 4 · Read

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

Step 2 of 4 · Do

Set up three tests: a metal and a plastic rod with wax-stuck pins, a beaker of water with a potassium permanganate crystal at one corner, and a matt black and a shiny can of hot water. Record which transfer dominates in each.

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 transfer method needs no medium?

How sure are you?😐 maybe

Question 2 of 2

Convection currents form because warmer fluid is:

How sure are you?😐 maybe

Mind = blown

🔬 The more you look, the more nature shows you.

Nice work!

You got 0 of 2 right.

Next: Specific Latent Heat All lessons

🎯

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✨ More to explore

🌍 Where you see this in real life: This shows up in your everyday life more than you'd think.

🏆 Stretch challenge (try it this week): Try one experiment in real life this week — even a tiny one.

👨‍👩‍👧 For the dinner table: “What's the most surprising thing you learned today?”

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