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Unit 1 "What is Big History" + Unit 2/Threshold 1 "The Big Bang"
The first two units of Big History...combined!
Terms in this set (49)
History of the Universe that uses evidence from many disciplines. Big History is a modern scientific origin story.
Uses viewpoints from many different scholars. Examples, historians, geologists, chemists.
Degrees of magnification or perspective, used to measure time, space, and size.
Thresholds of Increasing Complexity
Moments in the history of the Universe when specific ingredients under the right conditions come together to create something new and more complex.
A narrative about the beginning of the Universe and humanity.
Conditions that are "just right" to enable greater complexity in the Universe.
someone from whom you are descended (but usually more remote than a grandparent)
make fit for, or change to suit a new purpose
a period of 100 years
complicated in structure; consisting of interconnected parts
a living organism characterized by voluntary movement
the discipline that records and interprets past events including those events involving human beings
an event that is a beginning; a first part or stage of subsequent events
of or relating to the practice of science in an attempt to learn how the world and the universe works
All of space and everything in it
an interpretation of an event from a particular viewpoint
The branch of science that deals with the Universe and the various objects, like stars, planets, and galaxies。
A small unit of matter composed of protons, electrons, and usually neutrons. Atoms are basic building blocks of the matter we see in the Universe and on Earth.
A respectable or credible source; an expert.
A theory, first articulated in the 1920s, proposing that the Universe started out extremely hot and dense and gradually cooled off as it expanded.
A star that fluctuates in brightness and provides astronomers with a reference they can use to measure great distances in the Universe.
An assertion that something is true.
The use of strategies to decide whether a story or concept should or should not be trusted.
The ability to share, preserve, and build upon ideas over time.
Cosmic Microwave Background (CMB) or Cosmic Background Radiation (CBR)
Low-energy radiation pervading the entire Universe, released about 380,000 years after the Big Bang.
The study of the Universe on its largest scales, including its origin.
The apparent stretching out or contraction of waves because of the relative movement of two bodies.
One of the four fundamental forces or interactions, along with gravity, the weak nuclear force, and the strong nuclear force.
A negatively charged subatomic particle that orbits the nucleus of an atom.
The capacity to do work, associated with matter and radiation. Includes kinetic energy, potential energy, and chemical energy, among others.
Concrete, verifiable information that either supports or disproves a claim.
The fundamental force of attraction between any two objects that have mass.
The second simplest of all chemical elements, helium has two protons and (almost always) two neutrons. Helium was produced soon after the Big Bang.
The simplest of all chemical elements, hydrogen has one proton. Hydrogen was the first element produced after the Big Bang and is the most common element in the Universe.
The idea that space and time underwent an expansion at a rate much faster than the speed of light .
A "gut feeling" that is not necessarily based on logic or evidence.
A measure of distance in space; the distance that light travels in a vacuum in one year. It is equal to roughly 9.5 trillion kilometers, or 5.9 trillion miles.
The application of systematic reasoning to arrive at a conclusion.
The physical material of the Universe, including subatomic particles, atoms, and the substances that are built out of them.
An electrically neutral subatomic particle present in the nuclei of most atoms. Unlike protons, the number of neutrons in a given element can vary, giving rise to different isotopes of an element.
The extremely dense and positively-charged region at the center of an atom that consists of protons and neutrons.
The change in the apparent position of an object caused by movement of the observer.
A subatomic particle with a positive electric charge. The number of protons in an atom (the atomic number) determines which element it is: For example, carbon atoms always have 6 protons, while iron atoms always have 26 protons.
The phenomenon in which light waves from distant galaxies are "stretched out," which for visible light means a shift toward the red side of the spectrum. Redshift provides scientists with strong evidence that the Universe is expanding, since the expansion of space explains the stretching of the light waves.
The process of gathering evidence to test and refine scientific theories.
The unification of space and time into a single four-dimensional continuum or "fabric." Space makes up three of the dimensions, while time makes up the fourth, and cannot be fully separated from space. .
speed of light
The speed at which light travels in a vacuum: roughly 186,000 miles per second.
An instrument used for viewing distant objects, including planets, stars, and galaxies.
thermodynamics (first law of)
One form of the law of conservation of energy, which states that energy may change forms but cannot be created or destroyed.
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