ScienceThe ProfessorBeginner
Mastering Your Refrigerator course icon

Mastering Your Refrigerator

Like Duolingo, but for Mastering Your Refrigerator. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.

For the part of you with thirty open tabs that never became anything.

54 bite-size levelsAbout 5 minutes each

Free during early access · No credit card · iPhone & Android

Frosty the Fox
Mastering Your Refrigerator
with Frosty the Fox
54
Levels
4
Sections
5
Min/day
What you'll learn

Key ideas in Mastering Your Refrigerator

  • Cold air is denser than warm air and sinks to the bottom
  • The door is the warmest part of the fridge due to frequent opening
  • Heat rises within the enclosed fridge cabinet
  • Perishables like milk require the most stable, coldest temperatures
  • Why the bottom shelf is the coldest part of the main fridge body
  • The safety of storing highly perishable items in the door
  • Closing vents traps moisture to prevent wilting
  • Fridges cool by circulating air around items
  • Opening vents allows ethylene gas to escape, preventing rot
  • How crisper drawer settings affect different produce types
  • Blocked airflow creates warm pockets where bacteria can grow
  • The impact of overcrowding on air circulation and food safety
  • The door is exposed to room air most often
  • Internal air settles into a vertical temperature gradient
  • Bacteria multiply most rapidly between 40°F and 140°F
  • Temperatures below 40°F slow bacterial growth significantly
Why not just Google it

You've tried the other tabs

Wikipedia

Thirty open tabs. Four facts you actually kept.

YouTube

You watched. You nodded. By Sunday it was gone.

ChatGPT

One answer, then back to scrolling.

Online courses

Eight weeks. You meant to finish. You didn't.

Tomo gives Mastering Your Refrigerator the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.

Try a question

Here's what playing it feels like

A real question from this course. Take your best guess.

Mapping Your Fridge's Microclimates

Which area of the refrigerator experiences the most temperature fluctuation and highest heat levels?

Get it right to open this lesson and 53 more in the app.

Course map

Where Mastering Your Refrigerator takes you

Learn how to keep your food fresh and your drinks cold by mastering the science of cooling. Discover how your fridge moves heat around and how you can fix common cooling problems yourself.

  1. 1

    Keeping Things Cold Every Day

    • Where to Put Your Groceries for Max Freshness
    • Setting the Perfect Temperature
    • Why You Should Never Leave the Door Open
    • Cleaning the Coils to Save Energy
  2. 2

    Solving Common Fridge Mysteries

    • Why is My Lettuce Freezing?
    • Finding the Source of Strange Noises
    • What to Do When the Ice Maker Stops
    • Checking the Door Seal with a Dollar Bill
    • Why Water is Leaking on the Floor
    • How to Reset Your Fridge After a Power Outage
  3. 3

    The Magic of Moving Heat

    • Cold Isn't Real: It's Just Less Heat
    • How Liquids Can Turn into Cold Gas
    • The Job of the Compressor Pump
  4. 4

    The Hidden Parts Inside the Walls

    • The Evaporator: The Part That Gets Cold
    • The Condenser: Where the Heat Escapes
    • The Expansion Valve: The Tiny Gatekeeper
    • How the Thermostat Tells the Fridge to Start
    • The Secret Life of Refrigerant Chemicals

4 sections · 18 units · 54 levels. Built to play, not to enroll.

How it's taught

You pick the voice

This course
The Professor

Mastering Your Refrigerator is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.

Keep going

More Science on Tomo

Dragon Anatomy: Beyond the Basics

Storyteller

Move past simple myths to understand how a dragon's body actually functions. Explore the mechanics of flight, the chemistry of fire-breathing, and the specialized armor that protects these legendary beasts.

54 levels1h 48mIntermediate

The Sky-Shield Experiment

Professor

Explore the controversial science of spraying particles into the sky to cool the planet. Learn which materials are being tested, how they reflect sunlight, and what happens when they eventually fall back to Earth.

26 levels52mBeginner

Quantum Physics in Your Pocket

Professor

Move beyond the mystery and see how quantum mechanics powers your everyday life. Discover how particles behaving like waves make your smartphone, medical scans, and future computers possible.

54 levels1h 48mIntermediate

Build Things That Don't Break

Bestie

Ever wonder why skyscrapers don't topple or how bridges carry thousands of cars? Learn to think like an engineer by mastering the hidden forces that hold our world together.

26 levels52mBeginner

The Weird World of Quantum Physics

Professor

Ever wonder how things can be in two places at once? Discover the strange rules that run our universe and how they power the gadgets you use every day.

26 levels52mBeginner

CERN and the Mystery of the Mandela Effect

Storyteller

Explore the mind-bending theories connecting the world's largest particle collider to shifts in our collective memory. Discover how scientists hunt for hidden dimensions and why some believe our reality has already branched off.

26 levels52mBeginner
Start free

Start Mastering Your Refrigerator today.

Download Tomo, search Mastering Your Refrigerator, and play your first lesson in under a minute.