Manhattan Project Timeline
for kids
The following fact
sheet contains interesting history, facts and information on
the Manhattan Project Timeline
for kids.
The Manhattan Project Timeline for kids:
Timeline of Famous People and Events
Manhattan Project Timeline:
1919 - British physicist Ernest Rutherford
and his studies of radioactivity led the exploration of
nuclear physics and the discovery of the proton by
artificially transmuting an element (nitrogen into
oxygen).
Manhattan Project Timeline:
1931 - Harold C. Urey discovers deuterium
(heavy hydrogen)
Manhattan Project Timeline:
1931 - Robert J. Van de Graaff develops the
high-voltage electrostatic generator used in atomic
research
Manhattan Project Timeline:
1932 - James Chadwick discovers the neutron enabling the
utilization of nuclear energy.
Manhattan Project Timeline:
1932 - J. D. Cockroft and E. T. S. Walton were the first
to split the atom
Manhattan Project Timeline:
1932 - Ernest O. Lawrence and his colleagues M. Stanley
Livingston and Milton White successfully operated the first
cyclotron. (A Cyclotron is a machine used as a circular particle
accelerator for positively charged ions (usually protons, deuterons,
and alpha particles) used to initiate nuclear transformations upon
collision with a suitable target)
Manhattan Project Timeline:
1934 - Enrico Fermi produces fission, the splitting of
an atomic nucleus resulting in the release of large amounts of
energy. Szilard files a patent application for the atomic bomb
describing the concept of using neutron induced chain reactions to
create explosions.
Manhattan Project Timeline:
1938 - In December 1938 Otto Hahn and Fritz
Strassmann discover the process of fission in uranium
Manhattan Project Timeline:
1938 - Lise Meitner and Otto Frisch provided
the evidence for the Hahn-Strassmann and nuclear fission
and communicated their findings to Niels Bohr
Manhattan Project Timeline:
1939 - January 26,1939: Niels Bohr who had
made foundational contributions to understanding atomic
structure reported on the Hahn-Strassman results at a
meeting on theoretical physics in Washington, D. C.
Manhattan Project Timeline:
1939 - Walter Zinn, Enrico Fermi, Herbert L. Anderson ,
John R. Dunning and Leo Szilard work together at Pupin Physics
Laboratories at Columbia University in New York City, investigating
whether uranium-238 fissioned with slow neutrons, as Fermi believed,
or only the uranium-235 isotope, as Niels Bohr contended
Manhattan Project Timeline:
1939 - Hungarian physicist Leo Szilard was
the first man to realized that nuclear power could be
used to build a bomb of terrifying proportions
Manhattan Project Timeline:
1939 - August 2, 1939: A letter signed by
Leo Szilard and Albert Einstein was sent to Alexander
Sachs, who had access to President Franklin D.
Roosevelt, to inform him that "a nuclear chain reaction
in a large mass of uranium" was undoubtedly possible,
and could lead to the construction of "extremely
powerful bombs of a new type". The letter warned that
Germany might be developing such a weapon
Manhattan Project Timeline:
1939 - September 1, 1939: Germany invades Poland and
this event delays the meeting between Alexander Sachs and the
President
Manhattan Project Timeline:
1939 - October 11-12, 1939: Alexander Sachs discusses
Einstein's letter with President Roosevelt. FDR decides to act and
appoints Lyman J. Briggs head of the Advisory Committee on Uranium,
a top-secret project to investigate the possibility of utilizing
energy from the atomic fission of uranium.
Manhattan Project Timeline:
1939 - October 19, 1939: President Roosevelt wrote back
to Einstein informing the physicist that he had setup a committee
consisting of Alexander Sachs and representatives from the Army and
Navy to study uranium.
Manhattan Project Timeline:
1939 - November 1, 1939: The Uranium Committee
recommends that the government purchase uranium oxide and graphite
for fission research.
Manhattan Project Timeline:
1940 - February 1940: Physicists Otto Frisch and Rudolf
Peierls write a theoretical analysis of the possibility of fast
fission in U-235.
Manhattan Project Timeline:
1940 - The University of California begins building a
giant cyclotron under the direction of Ernest O. Lawrence.
Manhattan Project Timeline:
1940 - July 1940: The U.S. Army Intelligence office
denies Albert Einstein the security clearance needed to work on the
Manhattan Project
Manhattan Project Timeline:
1940 - March 1940: John R. Dunning and his team
demonstrate that fission is more readily produced in the rare
uranium-235 isotope, not the more plentiful uranium-238.
Manhattan Project Timeline:
1940 - June 1940: Vannevar Bush is named head of the
National Defense Research Committee and the Uranium Committee
becomes a scientific subcommittee of the organization.
Continued...
The Manhattan Project Timeline for kids:
Timeline of Famous People and Events
Facts
about the Manhattan Project Timeline for kids
Our interesting
Manhattan Project Timeline continues with more facts for kids that are
detailed below. The history of the Manhattan Project is told in a
factual timeline sequence consisting of a series of short facts
providing a simple method of relating the
history and the important events
and people who contributed to the Manhattan Project and the
development of the Atomic Bomb.
The Manhattan Project Timeline for kids:
Timeline of Famous People and Events
Manhattan Project Timeline:
1941 - February 24, 1941: Glenn T. Seaborg’s research
group, including and Arthur Wahl, working at the University of
California in Berkeley discovers plutonium and the group
demonstrates that plutonium is fissionable on March 28, 1941
Manhattan Project Timeline:
1941 - May 3, 1941: Glenn Seaborg proves plutonium is
more fissionable than uranium-235.
Manhattan Project Timeline:
1941 - June 28, 1941: Vannevar Bush is named
head of the Office of scientific Research and
Development and James B. Conant replaces Bush at the
National Defense Research Committee
Manhattan Project Timeline:
1941 - July 2, 1941: The British MAUD report concludes
that an atomic bomb is feasible and the findings are sent to Bush
and Conant of the Manhattan Project .
Manhattan Project Timeline:
1941 - October 9, 1941: Vannevar Bush briefs FDR on the
progress of atomic bomb research. The President instructs Bush to
find out if an atomic bomb can be built and at what cost.
Manhattan Project Timeline:
1941 - The Japanese attack
Pearl Harbor on December 7,
1941 and the United States enters the war on December 8, 1941.
Manhattan Project Timeline:
1942 - January 19, 1942: FDR approves
production of the atomic bomb
Manhattan Project Timeline:
1942 - May 12, 1942: President Roosevelt
signs an order creating a secret project, called the
Manhattan Project, to develop the nuclear weapon
Manhattan Project Timeline:
1942 - September 23, 1942: Leslie Groves is put in
charge of the Manhattan Project and recruits J. Robert Oppenheimer
as Scientific Director.
Manhattan Project Timeline:
1942 - October 15, 1942: Leslie Groves asks J. Robert
Oppenheimer to head Project Y, the new planned central laboratory
for weapon physics research and design at the Manhattan Project .
Manhattan Project Timeline:
1942 - November 16, 1942: Los Alamos, New Mexico was
selected as the site for Project Y, for the main atomic bomb
scientific laboratory
Manhattan Project Timeline:
1942 - December 2, 1942: Enrico Fermi and his
Manhattan Project team
produce the world's first controlled and self-sustained nuclear
fission reaction in a squash court under Stagg Field at the
University of Chicago
Manhattan Project Timeline:
1943 - January, 1943: Groves acquires the Hanford
Engineer Works on the Columbia River in Washington for plutonium
production reactors and separation plants for the Manhattan Project
Manhattan Project Timeline:
1943 - August 19, 1943: The Quebec Agreement, between
the United States and Great Britain, was signed outlining the
coordinated development of the nuclear energy and the weapons that
employed nuclear energy. A large team of British and Canadian
scientists moved to the US to work on the Manhattan Project.
Manhattan Project Timeline:
1943 - November 4, 1943: A large
experimental graphite reactor (the X-10) was constructed
at Oak Ridge nuclear facility in Tennessee to provide
research quantities of plutonium
Manhattan Project Timeline:
1943 - November 29, 1943: The US Military
begin remodeling the B-29 Superfortress bomber for the
delivery of the Atomic bomb.
Manhattan Project Timeline:
1943 - Four different size casings were made for the
Atomic bombs. "The gadget" was the code name given to the first bomb
tested. The "Thin Man" bomb was long and thin representing Roosevelt
and "Fat Boy" was round and fat representing Churchill. The Little
Boy bomb was a development of the unsuccessful Thin Man nuclear bomb
using uranium rather than plutonium.
Manhattan Project Timeline:
1943 - Project Alberta began to prepare for the delivery
of atomic weapons during combat by conducting weapons delivery
tests, modifying aircraft for carrying the atomic weapons developed
by the Manhattan Project. The B-29 Superfortress bomber was remodeled to deliver the Atomic bomb and
the organization and training of flight crews and field teams for
weapons handling began.
Manhattan Project Timeline:
1944 - January 1944: Construction begins on Abelson's
thermal diffusion plant at the Philadelphia Naval Yard.
Manhattan Project Timeline:
1944 - March 1944: Manhattan Project Bomb models are tested at Los Alamos.
Manhattan Project Timeline:
1944 - Oak Ridge and Hanford produce increasing amounts
of fissionable material and Los Alamos makes significant progress in
weapon design for the Manhattan Project.
Manhattan Project Timeline:
1944 - July 17, 1944: The plutonium gun bomb
(Thin Man) is abandoned to be replaced with the Little
Boy bomb
Manhattan Project Timeline:
1944 - September 1944: Colonel Paul Tibbets
and the 393rd Bombardment Squadron begin test drops with
dummy bombs called "Pumpkins".
Manhattan Project Timeline:
1945 - February 4-11, 1945: Roosevelt, Churchill, and
Stalin meet at the
Yalta Conference.
Manhattan Project Timeline:
1945 - April 12, 1945: President Franklin D.
Roosevelt dies, and Harry S. Truman becomes President of
the United States.
Manhattan Project Timeline:
1945 - April 25,1945: Secretary of War Henry
Stimson and Groves brief President Harry Truman on the
Manhattan Project.
Manhattan Project Timeline:
1945 - April 27, 1945: The first meeting of the Target
Committee was held to select targets for atomic bombing.
Manhattan Project Timeline:
1945 - June 1945: Scientists issue the
Franck Report, advocating international control of
atomic research and proposing a demonstration of the
atomic bomb prior to its use in combat.
Manhattan Project Timeline:
1945 - June 6, 1945: Henry Stimson informs President
Harry Truman that the Interim Committee recommends keeping the
atomic bomb a secret and using it as soon as possible without
warning.
Manhattan Project Timeline:
1945 - June 14,1945: Leslie Groves, overall director of
the Manhattan Project, submits the target selections to General
George Marshall.
Manhattan Project Timeline:
1945 - July 16, 1945: Trinity was the code name of the
first detonation of a nuclear weapon (The Gadget) conducted by the
United States Army at Alamogordo, New Mexico. 'The Gadget' atomic
bomb exploded with a 18,000 ton TNT equivalent
Manhattan Project Timeline:
1945 - July 26, 1945: President Truman,
British Prime Minister Clement Atlee and Chinese
President Chiang Kai-Shek, issue the Potsdam
Proclamation, calling for Japan to surrender
unconditionally. The Japanese reject the idea.
Manhattan Project Timeline:
1945 - August 6, 1945: The Little Boy, is dropped on
Hiroshima. Casualties have been estimated between 90,000 and 160,000
in Hiroshima, half of victims died within 24 hours of the blast.
Manhattan Project Timeline:
1945 - August 9, 1945: Fat Man, the
implosion model plutonium bomb is dropped on Nagasaki.
Casualties have been estimated at least 60,000 in
Nagasaki.
Manhattan Project Timeline:
1945 - 15 August, 1945: Japan surrenders bringing WW2 to
an end
The Manhattan Project Timeline for kids:
Timeline of Famous People and Events
Manhattan Project Timeline for kids - President Franklin Roosevelt Video
The article on the Manhattan Project Timeline provides detailed facts and a summary of one of the important events during his presidential term in office. The following
Franklin Roosevelt video will
give you additional important facts and dates about the political events experienced by the 32nd American President whose presidency spanned from March 4, 1933 to April 12, 1945.
Manhattan Project Timeline
●
Interesting Facts via the Manhattan Project Timeline for kids and schools
●
Manhattan Project Timeline in US history
●
Manhattan Project Timeline of important, key
events
●
Franklin Roosevelt
Presidency from March 4, 1933 to April 12, 1945
●
Fast, fun facts via the Manhattan Project Timeline
●
President Franklin Roosevelt and the Manhattan Project
Timeline
● Franklin Roosevelt Presidency and
the Manhattan Project Timeline for schools,
homework, kids and children |