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The Manhattan Project: Key Events and Impacts of the Atomic Bomb in WWII

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This lesson explores the Manhattan Project, led by J. Robert Oppenheimer, and the development of the atomic bomb. Students will learn about the hesitations President Truman faced in using the bomb, the selection of Hiroshima and Nagasaki as targets, and the devastating effects these bombings had. The session will examine the significance of the atomic bomb in Japan’s surrender and the end of World War II, and how the decision to use the bomb shaped post-war reconstruction and geopolitical dynamics.

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The Manhattan Project: Key Events and Impacts of the Atomic Bomb in WWII

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Presentation Transcript

  1. Hello! • 1. Please pick up a handout on your way in, and have your Need to Know List on your desk. • “Boom! Shake the Room” • DJ Jazzy Jeff & The French Prince

  2. Learning Goal 11 • I will be able to:-Define Manhattan Project-Identify J. Robert Oppenheimer-Explain what the atom bomb was-Summarize why Truman was hesitant to use the bomb-Explain why Hiroshima and Nagasaki were chosen as targets-Summarize the effects of the bomb-Explain how the atomic bomb led to Japan’s surrender and end of WWII

  3. Building Blocks of Life… • Which element is considered the “building block of life?”

  4. 5.11 Manhattan Project J. Robert Oppenheimer Atom Bomb Why Truman was hesitant to use it Hiroshima & Nagasaki Effects How it led to Japanese surrender • Code name for secret mission to build atomic bomb; German idea brought to US by Albert Einstein AB in NYC • Lead scientist, he and others begged Truman not to use it • Split atoms, release energy, 3 built, 1st tested in NM desert • Tremendous civilian casualty, ignite oxygen? Fearing impeachment, gave approval • H: 8/6/45, “Little Boy” dropped from the Enola Gay, J told to surrender or get another, N: 8/9/1945, J told to surrender or get another, cities chosen b/c of factories and b/c they hadn’t been bombed yet • Almost 80k (city pop 250k) killed instantly in Hiroshima, 40k in Nagasaki • Japan told to surrender or face another, surrendered on August 14, 1945 • May 8th, 1945 = VE Day August 14th, 1945 = VJ Day • US spends billions of $$ to rebuild G & J b/c learned from WWI that leaving country in ruin leads to more problems! • If Japan surrenders to USSR (declared war 8/9/45) Communism may spread there.

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