chem and phys
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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| chemistry | the study of composition, structure, properties, and reactions of matter
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| convection | transphers by currents with fluid. (boiling water, air current, heating of a room
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| friction | a force that opposes the motion of objects that touc h as they move past each other( can transpher electrons through this)
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| atomic number | number of protons(gives you number of electrons as well). gives you protons in an atom
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| nutron | has no charge in found in the nucleus. subtromical particle
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| density | the ratio of a material's mass to it's volume
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| celcius | freezing point is zero, boiling point is 100
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| alloy | a mixture of two or more elements at least one which is metal, that has charecteristics properties of metals
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| mass number | the sum of the protons and neutrons in the nucleus
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| atomic mass unit | one twelth the mass of a carbon -12 atom(AMU)
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| acid | a coumpound that produces hydronium when dissolved in water, a protondonor.
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| farhenhit. | freezes at 32 degress, boils at 212 degress
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| dissolving | a breakdown of cystal
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| frequency | the number of complete cycles per unit of time for a periodic motion
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| length | the straight line distance between two points
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| base | a coumpound that produces hydroxide ions. When dissolved in water; a proton accepter.
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| matter | has mass which encludes atoms and other particles
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| physics | the study of matter and energy and the interactions between the two forces of motion
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| barometer | instrument used to messure atmospheric pressure. (Uses water, air, and mecury)
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| boiling | when vapor and pressure in equal to atmospheric pressure
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| inertia | the tendency of an object to resist a change in motion
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| ionic | kind of bonding where an atom shares its electrons as the other atom gains electrons when bonding. Is always metals with non-metals.
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| compound | a substance that is made from 2 or more simpilier substances and can be broken down into simplier substance
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| mass | the amount of matter in an object
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| salt | ionic compound. formed when acids react with bases
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| evaporations | happens when temperature is below substances boiling point
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| covalent bonding | when they do not share atoms equally( is always non metals with non metals)
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| weight | the force of gravity acting on an object
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| gravity | the attraction between two any 2 objects because of their masses
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| condinsation | the phase change in which a substance changes from a gas or vapor to a liquid. (think of clouds raining)
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| radioactivity | the process in which an unstable atomic nucleus emits charged particles and energy( think of clouds setting of electricity or lighting)
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| Galileo | studies how gravity produces constant acculation, moving objects not subject to friction would continue to move indefineity.
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| Newton | built work on scientist. Came up with laws of motion. Law of Inerertia: a state of a motion of an object will not change as long as force acting on the object is zero 2nd Law: acceleration of an object is equal to the net force acting on it divided by o
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| Einstein | law of relativity: came up with two ways to measure mass with same value
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| Curie | discovered the radioactivity elements radium and polonium advance study of radio activity
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| Law of Matter | matter cannot be created nor destroyed in an isolated system
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| Chemical equations. | chemical reaction in which the reactions and products are expressed as formulas
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| atomic mass | the electrons and protons added together( when subtracted will give you your neutrons)
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