It takes the average reader and 49 minutes to read Smoke Screens and Gas Masks by Tim Ripley
Assuming a reading speed of 250 words per minute. Learn more
In the 1960s during the Vietnam War, US forces used a chemical substance called napalm to burn away the jungle in search of enemy soldiers. But when napalm came in contact with human skin, it caused horrific injuries. Its use in war became highly controversial. Chemistry has long been at the heart of warfare. The invention of gunpowder ninth-century China led to the development of guns, grenades, and other explosives. In World War I chemists created deadly poison gas—as well as gas masks to protect soldiers from enemy gas. From Greek fire to bulletproof vests, learn how chemistry has changed...
Smoke Screens and Gas Masks by Tim Ripley is 48 pages long, and a total of 12,384 words.
This makes it 16% the length of the average book. It also has 15% more words than the average book.
The average oral reading speed is 183 words per minute. This means it takes 1 hour and 7 minutes to read Smoke Screens and Gas Masks aloud.
Smoke Screens and Gas Masks is suitable for students ages 8 and up.
Note that there may be other factors that effect this rating besides length that are not factored in on this page. This may include things like complex language or sensitive topics not suitable for students of certain ages.
When deciding what to show young students always use your best judgement and consult a professional.
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