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Igneous Rocks Used to Be Liquid!
Discover igneous rocks — how they form when super-hot liquid rock (magma underground, lava above) cools and hardens into solid stone. Learn that 'igneous' comes from the Latin word for fire, and where to find basalt.
How it works
- Press play to start the video.
- Videos 5 minutes or longer pause once or twice for a quick check. Get it right and you're on your way. If not, you'll see a friendly explanation and the video simply keeps going. Short videos skip the checks.
- At the end there's a 3-question test. Score 60% or more to complete the lesson, and 80% or more to master it. You can always watch again and try for a higher score.