cset multi
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| acid | a compound that yields hydrogen ions in solution
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| alkali metals | lithium, sodium, and potassium; common as hydroxides
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| alloy | a metal composed of two or more metallic elements
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| atom | the smallest particle of matter that cannot be subdivided by chemical reactions
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| atomic number | the number of protons in an atomic nucleus; the different chemical elements have different atomic numbers
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| base | a compound that yields hydroxyl (OH~)ions in solution
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| Boyle's law | the volume of a gas varies inversely with pressure
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| carbon dioxide | CO2 is a colorless, noncombustible gas under normal conditions
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| catalyst | a substance that accelerates a chemical reaction, without itself being a reactant
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| Charles' law | the volume of a gas varies directly with temperature
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| combustion | rapic oxidation that releases heat and light
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| compound | a substance formed by the chemical union of several chemical elements
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| decomposition | a chemical reaction in which a compound is broken down into simpler compounds or elements
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| density | mass per unit volume of a substance
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| diffusion | the mixing of different substances, commonly in a liquid or gas
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| distillation | the process of purification in which an impure substance is heated to vapors, which are collected and condensed
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| electrolysis | a chemical change brought about by an electric current; used to separate chemical elements
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| electron | a negatively charged, subatomic particle; electrons form a cloud around the atomic nucleus. Electron movement constitutes electrical current.
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| element | a substance that cannot be decomposed to simpler substances
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| evaporation | a change of state from a solid or liquid to a gas
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| freezing point | the temperature at which a liquid changes to a solid
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| hydrocarbons | compounds of carbon and hydrogen
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| hydrolysis | chemical decomposition of a compound by reaction with water
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| ion | a charged atom or group of atoms formed by the gain or loss of electrons
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| isotope | ...of an element have the same number of protons and show the same chemical behavior, but they differ in the number of nuclear neutrons and thus in atomic weight; they may be stable or radioactive
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| litmus | paper that turns red in acid and blue in alkaline solution
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| mixture | substances mixed without a chemical reaction; the substances can be in any proportion
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| molecule | the smallest particle of a compound, composed of several bonded atoms
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| neutron | a subatomic particl of zero charge that occurs in the atomic nucleus
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| organic compound | a compound with interconnected carbon atoms
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| oxidation | the addition of oxygen to a substance
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| pH | a number indicating the concentration of hydrogen ions in a solution. A pH of 7 is neutral, less than 7 is acidic and greater than 7 is alkaline
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| proton | a subatomic particle with a positive charge, occurring in the atomic nucleus
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| saturated | describes a solution that contains as much solute as possible
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| solute | the substance dissolved in a solution
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| solvent | the pure liquid within a solution
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| sublimation | the change from a solid to a gas, without an intermediate liquid
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| synthesis | the formation of a compound by combining elements or simpler compounds
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| asteroid | a minor planet or planetary fragment; most of the thousands of known asteroids are between the orbits of Mars and Jupiter
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| cluster | a concentration of stars; some globular clusters contain thousands of stars
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| comet | a diffuse body that glows with a prominent tail when its orbit brings it near the sun
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| constellation | an apparent group of stars
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| eclipse | the obscuring of light from a celestial body by the passage of another body between it and the observer
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| galaxy | an astronomical system composed of billions of stars; galaxies are classified as spiral, elliptical, and irregular
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| latitude | refers to the degrees north or south of the equator
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| light-year | the distance light travels in one year, about 6x10(12)
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| longitude | refers to the degrees east or west of the prime meridian at Greenwich, England
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| luminosity | the intrinsic brightness of a star relative to the brightness of the sun
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| meteor | the streak of light produced by the passage of an interplanetary particle through the earth's atmosphere
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| meteorite | a rock from interplanetary space found on the earth's surface
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| milky way | the spiral galaxy to which our solar system belongs
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| nebula | a cloud of gas or dust in interstellar space
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| nova | a star that suddenly becomes many times brighter than usual
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| quasar | quasi-stellar radio source; a distant object with extraordinary luminosity
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| star | a large, hot, glowing body of gases
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| sunspot | a darker patch observed on the surface of the sun
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| tide | the rise and fall of the ocean due to gravitational attraction by the moon and sun
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Created by:
josboys
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