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Earth & Space ScienceGrade 6-8

Volcanoes Answer Key

Investigate how volcanoes form, erupt, and shape Earth's surface.

Looking for Volcanoes answers? This complete answer key provides verified solutions for all student exploration activities and assessment questions in the ExploreLearning Volcanoes Gizmo.

100% Free • Step-by-step explanations • Perfect for homework help • Covers all activities • Updated for 2026

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Prior Knowledge Questions

Q1.What is magma?

Answer

Magma is molten rock found beneath Earth's surface.

Q2.What is lava?

Answer

Lava is magma that has reached Earth's surface through a volcanic eruption.

Q3.Where do most volcanoes occur?

Answer

Most volcanoes occur along tectonic plate boundaries, especially at subduction zones and mid-ocean ridges.

Activity A – Types of Volcanoes

Q4.What is a shield volcano?

Q5.What is a composite volcano (stratovolcano)?

Q6.What causes a volcanic eruption?

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