World 3 · Glaciers Carve U-Valleys · 10 min · PRO
Reading what ice left behind: past glaciers
Erratics, moraines and the last ice age
PRO · Landscape Lab
World 3: Glaciers Carve U-Valleys is part of PRO
The first world of Landscape Lab is free. PRO opens the other 21 lessons in 6 worlds — simulations, quizzes and all.
PRO includes
- All 60 labs — every world, every lesson
- Practice exams and certificates
$8.33/mo, billed yearly ($99.99) · or $39.99 monthly