---
title: "Active, Dormant & Extinct"
description: "Compare volcano labels: active means erupting now or recently in this lesson, dormant means quiet for a long time but able to erupt again, and extinct means another eruption is not expected"
canonical: https://lightmysky.com/learn/science/active-dormant-and-extinct-mt_dSeFrAWE4v
source: https://lightmysky.com/learn/science/active-dormant-and-extinct-mt_dSeFrAWE4v.md
retrieved: 2026-11-12
---

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# Active, Dormant & Extinct

Compare volcano labels: active means erupting now or recently in this lesson, dormant means quiet for a long time but able to erupt again, and extinct means another eruption is not expected

Subject: Science · Area: Volcanoes & Earthquakes · Ages 7 to 9
Page: https://lightmysky.com/learn/science/active-dormant-and-extinct-mt_dSeFrAWE4v

## Ready when they can

- Define active, dormant, and extinct using the lesson's labels
- Explain why a long quiet period does not prove that a volcano is safe from another eruption
- Use eruption history and other evidence to discuss a volcano's label, including when quiet years alone are not enough

## Lesson: Active, Dormant, or Extinct?

A volcano stays a volcano on quiet days. Scientists call one extinct when they do not expect another eruption. If new evidence suggests it could erupt again, they review that label.

Here we use active for a volcano erupting now or recently. Dormant means quiet for a long time but still able to erupt again. Extinct means another eruption is not expected. Active does not mean an eruption will happen soon.

*(drawing: These cards compare labels. They are not stages every volcano must follow.)*

There is no single number of quiet years that sorts all volcanoes. A long quiet time alone cannot prove extinction. Scientists use eruption history and other evidence. Some scientists include dormant volcanoes in the active group.

**Example.** Volcano B has been quiet for 700 years, but scientists think it could erupt again. Using our labels, it is dormant. Scientists do not expect Volcano C to erupt again, so they call it extinct.

*(drawing: Use both clues. Years alone do not decide the label.)*

A dormant volcano may erupt again, so quiet does not mean safe from eruptions. Scientists watch for changes such as earthquakes and ground movement to help judge possible danger. Monitoring cannot promise an exact eruption date or a long warning. Follow local safety advice.

**Recap.** Here, active means erupting now or recently. Dormant may erupt again after a long quiet time. Extinct means another eruption is not expected. Quiet years alone cannot decide the label.

*Lesson, questions and flashcards written for this dataset.*

## Practice

8 questions on this page, each with its working shown.

## Needs first

- [What Is a Volcano](https://lightmysky.com/learn/science/what-is-a-volcano-mt_S9SKah-yi_)

## Optional connections

- [Power of Eruptions](https://lightmysky.com/learn/science/power-of-eruptions-mt_BLQ2_OXPod)

## Opens up

- [Eruption Types & Volcano Shape](https://lightmysky.com/learn/science/eruption-types-and-volcano-shape-mt_W4j7T_PnGH)
- [Monitoring Volcanoes](https://lightmysky.com/learn/science/monitoring-volcanoes-mt_ZRoQVXf_aD)