Tuff

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/tuff

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 tuff?Tuff is a type of rock made from volcanic ash and debris that has been pressed together. It looks like a mix of tiny ash pieces and bubbly lava.
2. How does tuff form?When a volcano erupts explosively, it throws ash, small stones, and big bombs into the air. These fall back to the ground and, if they are hot enough, melt and stick together into solid rock.

Pyroclastic Rock: A rock composed wholly or in part of fragments (clasts) that were airborne during an explosive volcanic eruption.
Tephra: A general term for all volcanic fragments, regardless of size, that are ejected from a volcano and fall to the ground.
Lithification: The process by which loose sediments are converted into solid rock, typically involving compaction and cementation.
Welding (Volcanic): The fusion of hot volcanic glass shards and mineral grains in a pyroclastic deposit, forming a coherent rock.