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44 Cards in this Set
- Front
- Back
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Theory
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A theory is an explanation of how something happens
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Hypothesis
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A statement that describes why something happened
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Law
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Repeats the observation
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Models
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A model makes predictions
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Data
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Information
Qualitative: Forgetful Quantity: used by Science. (measuring to figure out things) |
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Chemistry
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The study of matter and how it changes
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Physics
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Study of motion and matter
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Chemical Reactions
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Reactions of electrons
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Matter
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Takes up space, has mass
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Element
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A substance that cannot be broken down to a simpler form
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Compounds
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A substance made of Atoms more then one element bonded together
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Molecules
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Smallest unit of a substance that has all the properties of that substance
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Chemical Formula
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Shows what kind of elements are
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Pure Substance
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Any matter that has a fixed composition and definite properties
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Mixture
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Two pure substances put together are mixtures
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Heterogeneous
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A visible difference in a substance when mixed with other things
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Homogeneous
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Cannot tell if a substance has more things mixed with it
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Kinetic Theory
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All matter is made of atom and molecules
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Absolute Zero
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The non movement of particles
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Heat
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Movement of matter
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Energy
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The ability to change or move matter
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Pressure
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The force exerted per unit are of a surface
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Micro-waves
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Things that are used in satellite and TV's
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Viscosity
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The resistance for a fluid to flow
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Chemical Property
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The way that a substance reacts with other substances to form new substances with different properties
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Reactivity
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The ability of a substance to combine chemically with another substance
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Physical Properties
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A characteristic of a substance that can be observed or measured without changing the composition of the substance (Metals are Shiny)
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Melting Point
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The temperature where a solid becomes liquid
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Boiling Point
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Temperature liquid becomes a gas below the surface
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Water Vapor
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The bubbles in boiling water
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Density
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The mass per unit volume of a substance
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Buoyancy
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The force with which a more dense fluid pushes a less dense substance upward
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Physical Change
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A change in the physical form or properties of a substance that occurs without a change in composition
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Chemical Change
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A change that occurs when substance changes composition by forming one or more new substances
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Radioactivity
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Process by which an unstable nucleus emits one or more particles or energy, in the form of EM radiation
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Nuclear Radiation
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Charged particles, or (radiation) energy emited by an unstable nucleus
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Alpha Particle
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Positively charged particle, emitted by some nuclei. They consist of two protons, 2 neutrons leaving the nucleus
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Beta Particle
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Neutron Decay and becomes (changes) a proton and an electron. The electron is emitted
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Gamma Emittion
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Releasing, Generating, Em radiation in the form of Gamma Rays
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Neutron Emittion
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The release of neutrons
High energy |
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Wave
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A disturbance that transmits energy through matter or space
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Medium
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The matter that waves move through
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EM Wave
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A wave caused by a disturbance by electric and magnetic waves. Light is part of an electro-magnetic spectrum
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Ether
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The medium in space that travels. They thought that there must be something that brought light through space
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