4474168
Description
Flashcards by Stephen Kerns, updated more than 1 year ago
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Created by Stephen Kerns
almost 9 years ago
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| Question | Answer |
| 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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