Temperature Versus Internal Energy

Lab Brief #1

🎯 Your mission

Set it up. Test it. Be amazed.

⚡ The twist

Nature loves to surprise the careful watcher.

What you'll learn

Temperature measures the average kinetic energy of particles; internal energy is the total energy of all particles in a body. A bath at 40 °C is cooler than a spark at 1,000 °C but holds far more internal energy, because it contains vastly more particles.

Key words

internal energy
The total kinetic and potential energy of all the particles in a body.
temperature
A measure of the average kinetic energy of the particles in a substance.

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

immersion heater
two beakers
balance
thermometer
stopwatch

Get ready

⚠️ Safety first

Hot water scalds — allow beakers to cool before moving them.
Keep the heater fully immersed whenever it is switched on.

Step 1 of 4 · Read

Think about what you just learned: say what "internal energy" and "temperature" mean in your own words before you start.

Step 2 of 4 · Do

Heat 100 g and 500 g of water with the same immersion heater for the same time and record both temperature rises. Explain why the smaller mass reaches the higher temperature despite receiving equal energy.

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

A spark at 1,000 °C has less internal energy than a warm bath because it has:

How sure are you?😐 maybe

Question 2 of 2

Temperature is a measure of the particles' average:

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: Conduction, Convection and Radiation 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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Temperature Versus Internal Energy

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