Details Title: Astronomy Quizzes 1-3 Description: Glossary Terms Total Flash Cards: 21 Created: 10/02/2008 10:51:17		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Astronomy Flashcards
Cards in this set: Term Atom Definition A submicroscopic particle with a nucleus and orbiting electrons. The smallest unit of a chemical element. Term Electric Charge Definition Electrical property of objects that causes them to attract or repel one another. Is either positive or negative. Term Electromagnetic force Definition is between electrically charged particles and magnets. Holds electrons to the nuclei of atoms. Term Electron Definition low mass negatively charged subatomic particle.Orbit the nucleus of atoms. Term Gluon Definition A particle that carries (or exerts) the strong force between quarks. Term Gravitational Force Definition force exerted on one body from another due to gravity. The force is directly proportional to the masses of both bodies involved and the distance between them. Term Hypothesis Definition An explanation proposed after observation based on facts. Term Law Definition A theory that can be expressed in mathematical form. Term Model Definition Theoretical representation of an object or system. Term Neutrino Definition Tiny neutral particles with immense penetrating power. Made when stars fuse hydrogen into helium or during supernovas. Term Neutron Definition subatomic particle with almost same mass as a proton but no electric charge. make up the nucleus of an atom along with protons. Term Photon Definition Particle of visible light or other electromagnetic radiation. Term Proton Definition Positively charged subatomic particle. Make up nucleus of atoms with neutrons and determine the type of atom. Term Quark Definition fundamental particle of matter that interacts via the strong force. Basic part of protons and neutrons. Term Scientific method Definition the process of observing something, making a hypothesis to explain it,and testing the hypothesis. Term Standard model Definition The current theoretical model that describes the fundamental particles and forces in nature. Term Strong force Definition The force that holds quarks together and binds protons and neutrons together. sometimes called nuclear force. Term Theory Definition Hypothesis or set of hypotheses that become well established through repeated testing. Term Universality Definition The assumption that physical laws on earth apply everywhere in the universe. Term Weak Force Definition Responsible for radioactive decay of atoms. Linked to electric and magnetic forces in what is called electroweak force. Term Definition