David A. Johnston

High school (ages 12+)
History & Culture

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/david-a-johnston

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. When was David A. Johnston born?December 18, 1949
2. When did David A. Johnston die?May 18, 1980
3. How big is David A. Johnston?Analysis of volcanic gases and their relationship to eruptions
4. What is the location of death?Observation post near Mount St. Helens, Washington
5. Who was David A. Johnston?David A. Johnston was a brave scientist who studied volcanoes. He worked for the U.S. Geological Survey and loved learning about volcanic gases.
6. What did he do at Mount St. Helens?He watched the volcano closely from a post near the summit. He was the first to tell people when the volcano started to erupt.

Volcanologist: A scientist specializing in the study of volcanoes, their origins, activity, and the materials they eject.
U.S. Geological Survey (USGS): A scientific agency of the United States government focused on geology, cartography, natural hazards, and biology.
Lateral Blast: A destructive, high-velocity expulsion of volcanic gases, ash, and rock that moves horizontally from the volcano's flank.
Volcanic Gases: Gases released from magma and volcanic rocks, often providing crucial indicators of subsurface volcanic activity and eruption potential.