Vocab Unit 2

Frage	Antworten
Astronomy	The branch of science that deals with the Universe and the objects within it.
Atom	A small unit of matter comprised of protons, electrons, and usually nutrons.
Cephid	A star that fluctuates in brightness and provides astronomers with a reference they can use to measure distance.
Collective Learning	The ability to share, preserve, and build on ideas over time.
Cosmic Background Radiation	Low energy radiation pervading the Universe, released around 30,000 years around the big bang.
Doppler effect	The apparent stretching out or contraction of waves because of movement between two bodies.
Energy	The capacity to do work, associated with matter and radiation.
Evidence	Concrete verifiable information that either supports or disproves the claim.
Gravity	The Fundamental force of attraction between any two objects that have mass.
Light-Year	A measure of distance in space; the distance light can travel in one year in a vacuum.
Matter	The physical material in the Universe including subatomic particles,atoms, and the substances that they are made of.
Nucleus	The extremely dense and positively charged region at the center of an atom that consists of protons and neutrons.
Parallax	The change of the apparent position of an object caused by movement of the observer.
Redshift	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.
Scientific method	The process of gathering evidence to test and refine scientific theories.
Telescope	An instrument used for viewing distant objects, including planets, stars, and galaxies.
Electromagnetism	One of the four fundamental forces or interactions, along with gravity, weak nuclear force, and strong nuclear force.
Electron	A negatively charged subatomic particle that orbits the nucleus of an atom.
Helium	The second simplest element of all chemical elements, has only two protons.
Hydrogen	The simplest of all chemical elements, only has one proton.
Inflation	The idea that spacetime underwent an expansion at a rate much faster than the speed of light during the first 10^-36 seconds after the big bang.
Newtron	An electrically neutral subatomic particle present oi the nuclei of most atoms.
Nucleus 2	The extremely dense and positively charged region at the center of an atom.
Proton	An subatomic particle with a positive electric charge. Determines what the element is.
Spacetime	Unification of space and time into a single 4-dimensional continuum or"fabric".
Speed of light	The speed that light travels in a vacuum, about 186,000 MPS.
Thermodynamics (the first law of)	One form of the law of the conservation of energy, which states that energy may change form, but can never be created or destroyed.

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	Erstellt von Stephen Kerns vor fast 9 Jahre