Ecological Succession

23 questions on this block. Tap an answer and it moves on by itself — correct answers advance immediately, misses hold a few seconds so you can read why.

Is there soil? No soil — lava, new island, glacier-scraped rock — is primary, starting with lichens. Soil left behind — fire, wind, landslide, old field — is secondary, starting with grasses.

Warm-up · not scored

Click the buttons and watch what changes.

Primary succession starts with no soil. Secondary succession starts where soil remains (for example after a landslide or fire), so it is faster.

Part 1What succession is

Part 2Primary succession

Part 3Secondary succession

Part 4Primary or secondary?

Part 5Putting it together

Ecological Succession

Warm-up · not scored

Review Complete

Worth another look