1. How did coal-powered steam engines make ocean and river transportation more reliable and efficient?

2. Why did coaling stations become strategically important during the age of steam-powered ships?

1. How did coke and Henry Cort's wrought iron process improve iron production during the Industrial Revolution?

2. What were the differences between cast iron and wrought iron, and why was each valuable?

1. How did the Bessemer Process transform steel production and why was steel important to industrial society?

1. What was the initial primary use of petroleum, and how did this change in the early 1900s?

2. How did petroleum extraction techniques lead to developments in machinery, automobiles, and aviation?

1. What role did the electrical generator play in enabling electrification and its applications?

1. How did Alexander Graham Bell's telephone and Thomas Edison's improvements make telephone technology more practical?

2. What was significant about Guglielmo Marconi's 1901 radio transmission across the Atlantic Ocean?