Causes of the Atomic Bombing of Hiroshima & Nagasaki Demonstrate research of the key causes of the bombings by adding key information you can find online into the comic strip with a relevant image below. Discovery of the atom c400BC-1905 John Dalton - 1808 Noticed that chemical elements seemed to combine with each other by discrete units of weight – used “atom” to refer to these units Thought they were fundamental units of matter (we now know that atoms are made up of protons, electrons, neutrons, quarks, etc.) John Dalton’s argument: perhaps all matter is made up of tiny little bits Splitting of the atom 1919-1939 Image: Fear of the Nazis 1939-1941 Image: Japanese Aggression 1931-1937 Image: Can atoms make bombs? 1939 Image: Pearl Harbor 1941 Image: Image: The Manhattan Project 1941-1945 The first bomb 1945 Image: The decision to bomb 1945 Image: Image: