Why distance is the wrong story, and how tilt, sun angle, and daylight actually drive seasons
4 sections · 8 lessons
Compare how seasons appear around the globe and reject the distance-only explanation as a first model.
1 lessonTrace Earth’s rotation and revolution, then connect axial tilt to changing sun angle and daylight length across the year.
3 lessonsDefine solstices and equinoxes, measure the small effect of Earth-Sun distance changes, and explain why opposite hemispheres have opposite seasons.
2 lessonsUse sun angle and daylength to make latitude-based predictions, then fit the full model to real seasonal data and its limits.
2 lessonsEvery lesson in order.
8 lessons
Earth’s seasons are not mainly a story of changing distance from the Sun. This course builds the real explanation from Earth-Sun geometry, showing how axial tilt changes sun angle and daylength, and why those changes vary by latitude and hemisphere. By the end, you can read solstices, equinoxes, and seasonal patterns with confidence, and use the model to explain real-world observations like polar day, polar night, and the lag between sunlight and temperature.
The course covers Earth’s rotation and revolution, axial tilt, sun angle, and how daylight changes across latitude and season. It also treats solstices, equinoxes, orbital eccentricity, perihelion, and worked seasonal predictions from real dates and locations.
From project managers and operators to founders, analysts, and teams adopting AI, Fenzo is for people who want to get better at the work they already do.
Anything from using AI for project planning and analysis to improving workflows, decision-making, communication, and delivery. If you can describe the skill or task, Fenzo can build a course around it.
Yes. Tell Fenzo what you do, what you’re trying to accomplish, and where you’re stuck, and Fenzo will shape the course around your role, your goals, and the work you actually have to do.
No. Fenzo adapts to your starting point, so you can begin with the fundamentals or jump straight into more advanced work.
Yes. Fenzo for Business puts the whole team on one plan — shared seats, courses you can assign, and reporting on who has finished what.
See Fenzo for BusinessYou start by describing your goal or taking a short skill benchmark. Fenzo uses that context to identify gaps and shape the learning experience around them.
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Something to operate in every section.
Three findings from decades of learning research shaped how every Fenzo lesson is built.
Average pass rate · Freeman et al., PNAS 2014
What the science says
Students in lecture-only classes are 1.5× more likely to fail.
How Fenzo does it
Every Fenzo lesson is interactive. No passive reading or watching, ever.
You work through itAI does it for you
Skill retention over time · with vs. without practice
What the science says
Offloading thinking to AI erodes the very skills you’re trying to build.
How Fenzo does it
Fenzo makes you do the thinking — guided, but never done for you.
Retrieval practiceRe-reading
Long-term recall · retrieval vs. re-reading
What the science says
Recalling information beats re-reading it for building durable understanding.
How Fenzo does it
Lessons weave in quizzes and recall prompts, so it sticks.