Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
5.4
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
1640
Points per Word
0.000305
Description
In 1915, German Zeppelin airships were bombing London and they seemed unstoppable. They flew too high for the British biplanes to shoot them down. But they had a weakness. They were filled with explosive gas.