Submarine volcano

High school (ages 12+)
Environment & Earth

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/submarine-volcano

1. What is the primary location?
2. What is the dominant eruption style?
3. What are submarine volcanoes and where do they usually form?
4. Why do submarine volcanoes usually make pillow lava instead of big explosions?

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the primary location?Mid-ocean ridges (divergent plate boundaries) and subduction zones (convergent plate boundaries)
2. What is the dominant eruption style?Effusive eruptions producing basaltic pillow lavas due to high hydrostatic pressure
3. What are submarine volcanoes and where do they usually form?Submarine volcanoes are volcanoes that erupt under the ocean. They most often form at divergent plate boundaries along mid‑ocean ridges, but can also appear at convergent boundaries and in hotspot areas.
4. Why do submarine volcanoes usually make pillow lava instead of big explosions?The great pressure deep in the ocean keeps eruptions gentle. When lava reaches the water it cools quickly and forms pillow‑shaped shapes instead of explosive blasts.

Seafloor Spreading: The process by which new oceanic crust is formed at mid-ocean ridges, driving plate tectonics.
Chemosynthesis: The biological process where organisms produce energy from chemical reactions, forming the base of vent ecosystems.
Seamount: An underwater mountain, typically of volcanic origin, rising significantly above the surrounding seafloor.