Geography · KS3 Y8 · Rivers & Coasts
Waterfalls and gorges
g21Free1:17Heddy Score 3 of 7, below the standardPlays from youtube-nocookie.com. No YouTube cookies until you press play.
What you need to know
- Waterfalls form where a band of hard rock sits above softer rock.
- The softer rock is worn away underneath, leaving an overhang that collapses.
- Repeated collapse moves the waterfall upstream, leaving a gorge.
In this clip
Heddy ScoreSeven checks every clip must pass before students see it: trusted, on the map, accurate, focused, accessible, safe, and proven by students.3/7, Below the standard
- Trusted source · passed. The creator's own upload, live and playable here.
- On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
- Spec-true · not judged yet. Accurate, and right for the current UK specification.
- Focused · passed. One idea, short enough to watch in one go.
- Accessible · passed. Good captions, clear sound and pictures.
- Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
- Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
Our students
How the Heddy Score worksNot enough students yet
Our own students' answers. These are what move ★7 Proven.Why we picked it
Follows one African river from source to sea to explain river processes and landforms; KS3 to GCSE.
CrashCourse on YouTubechecked 2026-10-16