Layers of the Atmosphere
Lesson notes
Overview
Temperature rises and falls through the troposphere, stratosphere, mesosphere and thermosphere. This topic is rated beginner and is number 15 of 98 in Earth & Space. Core ideas and first intuitions. No prior knowledge needed.
What you are seeing
The panel above shows a bar chart that compares values on one scale, so differences in size are easy to see. The animation is drawn live from the model, so everything you see responds to the sliders. Press Space to pause, use Restart to replay from the start, and change the speed to slow down quick events.
In depth
The atmosphere has layers defined by the temperature trend. In the troposphere, up to about 12 km, where weather happens, temperature falls with height. In the stratosphere it rises because ozone absorbs ultraviolet light, to about 50 km. In the mesosphere it falls again to about −90 °C at 85 km, and in the thermosphere it rises sharply as the thin gas absorbs solar radiation. Beyond that is the exosphere, merging into space.
Reading the relationship
The expression "top altitude" is a compact summary of the idea. It uses the symbols t, o, p, a, l, i; name what each one stands for before you start. Then use the sliders to see how changing one quantity changes the others.
A guided exploration
1. Run the animation once with the default settings and describe in words what happens. 2. Change one slider at a time and note which quantity responds most. 3. Push each slider to its extreme and decide whether the result still makes sense.
Try this
Start by only moving one slider at a time. Say aloud what you expect, then check.
Common pitfalls
Earth and space systems work on very different scales of time and distance. Check which scale a number refers to before comparing it with another.
How it connects
It builds on “How Glaciers Shape Land”, the topic before it in Earth & Space. Once you are comfortable, continue with “The Water Cycle”.
Why it matters
Earth and space science helps us understand our planet, its climate and the wider universe.
Where you might use it
- Revising “Layers of the Atmosphere” before a class, exam or certification
- Forecasting weather and understanding climate records and their uncertainty
- Planning for earthquakes, floods and other natural hazards in cities
- Interpreting satellite images, space missions and the age of rocks and stars
Frequently asked questions
What is Layers of the Atmosphere?
Temperature rises and falls through the troposphere, stratosphere, mesosphere and thermosphere. It is a beginner topic in Earth & Space.
How do I use the Layers of the Atmosphere simulation?
The panel at the top shows a bar chart that compares values on one scale, so differences in size are easy to see. Move the sliders one at a time, then press Space to pause the animation and look closer.
What does the formula mean?
The expression top altitude packs the idea into symbols. Name each symbol first, then change one quantity with the sliders and see which others respond.
Who is this topic for?
Core ideas and first intuitions. No prior knowledge needed. If the quiz feels hard, reread the lesson notes and try the previous topic first.
What should I learn before this?
Start with “How Glaciers Shape Land”, the previous topic in Earth & Space. Each topic in a subject builds on the ones before it.
How do I track my progress?
Press “Mark as learned” on this page. Progress is stored only in this browser and is never sent anywhere. The Browse page can show topics you have learned or still need to learn.