TECHNOLOGICAL DEVELOPMENTS AND HISTORICAL CHANGE


● Trains were also used to supply ammunition, food and clothes to the soldiers. ● The factories powered by steam engines produced the weapons, ammunition, clothes and food for the new larger armies.


Assessing Your Learning


1. Name two inventors involved in the development of the steam engine. 2. How was industry powered before the steam engine? 3. How did steam engines influence mining? 4. Name one other machine that could be powered by Watt’s steam engine. 5. Name two examples of cities that grew during the Industrial Revolution. 6. Why did cities grow during the Industrial Revolution? 7. How was their growth connected to the impact of the steam engine? 8. Where were the first public railways built? 9. How did steam engines make wars bloodier and more destructive?


New Technology – The Discovery and Use of Nuclear Energy – Its Impact on Historical Change


How did nuclear energy contribute to historical change?


Before: Various scientists from the end of the 19th century and into the 20th century helped to develop ideas about nuclear energy. Then, in 1938, Hahn and Strassmann in Germany showed how nuclear fission could split atoms and release nuclear energy.


After: During World War II, the USA used its wealth and technology to become the first country to develop the atomic bomb. In the Manhattan Project, the USA exploded the first atomic bomb (A-bomb) in the desert in New Mexico. After World War II, nuclear power or energy was also used in other different ways.


The development of nuclear energy Marie Curie


Ernest


Rutherford Albert Einstein


1


Scientific research


Niels Bohr Otto Hahn


Origins of Nuclear Power


Explore the contribution of nuclear energy to historical change


Key Words Cold War Arms race Nuclear war


Technology and Historical Change


Fear of German development of atomic bomb


2 World War II


Wealth and technology of USA


Atomic bomb


Manhatten Project


457


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