Forces and Early Universe History Quiz

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Within one second, the 4 fundamental forces were separated – gravity - the attraction of one body toward another – electromagnetic force - binds atoms into molecules, can be transmitted by ______

photons

Strong nuclear force - binds protons and neutrons together in the ______

nucleus

Weak nuclear force - breaks down an atom’s nucleus, producing radioactive ______

decay

After 3 minutes, photons and neutrons began to fuse to form the nuclei of hydrogen and ______ atoms

helium Signup and view all the answers

Deuterium – formed after the first collision of one neutron and one ______

proton Signup and view all the answers

Hubble's observations at the 100 inch during the 1920’s led him to the conclusion that the universe is ______

expanding Signup and view all the answers

The Hooker 100 inch telescope atop Mt.Wilson near Pasadena, CA was the largest telescope in the world from ______-1947

1917 Signup and view all the answers

A deep image of an “empty” portion of the sky with the Hubble Space Telescope reveals that the universe is filled with ______

galaxies Signup and view all the answers

The light we see from the most distant galaxies has traveled approximately 10 billion years to ______ us

reach Signup and view all the answers

Matter as we know it did not exist at the time of the Big Bang, only pure ______

energy Signup and view all the answers

Hydrogen and helium are the leftover matter from which stars and galaxies began forming through ______ fusion

nuclear Signup and view all the answers

When a dying star explodes, the heavier elements created by fusion are blown into space to be recycled by newly forming ______

stars Signup and view all the answers

The overall composition of galaxies is gradually changing to the ______ elements

heavier Signup and view all the answers

Our solar system, part of the Milky Way galaxy, consists of the Sun, nine planets, 64 known moons, many asteroids, millions of comets and ______

meteorites Signup and view all the answers

Nearly all planet and satellite orbital and spin motions are in the same ______

direction Signup and view all the answers

The Jovian planets are large, have a low density, and are composed of ______ and frozen compounds

gases Signup and view all the answers