Test 1
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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exothermic | reaction in which energy is released (explosions)
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endothermic | reaction in which energy is absorbed (cold pack)
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chemical reaction | process in which elements and/or compounds interact with one another to form more substances
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product | chemical(s) produced as a result of a chemical reaction
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reactant | starting material(s) in a reaction
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density | d=m/v
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mass | quantity of matter in an object
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matter | anything that has mass and volume
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quantity | something that has magnitude or size
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volume | space an object occupies
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weight | force of gravity acting on mass
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allotrope | one of the number of different molecular forms of an element
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atom | basic unit of matter
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element | one of 10 simplest substances from which more complex substances are made
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molecule | 2 or more atoms combined in a definite ratio, held together by covalent bonds, and is chemically neutral
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acid | class of compounds whose water solutions taste sour, turn blue litmus paper red, and react with bases to form salts
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base | class of compounds: taste bitter, feel slippery in water solution, turns red litmus paper blue, and react with acids to form salts
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compound | pure substances composed of atoms from 2 or more different elements, ionic bonds (ex: water)
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mixture | collection of 2 or more pure substances physically mixed together (ex: chicken soup, rocks in sand, iced tea, kool aid)
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ion | atom or group of atoms with electrical charge (ex: Na^+)
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inorganic compound | compounds that lack the element carbon
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organic compound | compounds that contains element carbon
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pH | numerical scale (0-14) used to express acidity or basicity; 0-7 is acid, 7 is neutral, 7-14 is base
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chemical bond | force of attraction between different atoms that binds atom together
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energy | capacity to do some type of work
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heat | sum total of kinetic energy of the particles in a sample of the matter
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kinetic energy | energy an object has because of its motion
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potential energy | energy an object has because of its postition
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specific heat | amount of heat energy requires to raise temperature of 1g of a substance by 1K
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system | a specific portion of matter in a given region of space that has been selected for study during an experiment or observation
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temperature | measure of average kinetic energy of particles in a sample of the matter
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hypothesis | reasonable and testable explanation of observations
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theory | well tested explanation of observation
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scientific law | description of natural world that has proven reliable over time
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accuracy | extent to which a measurement approaches true value of quantity
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precision | extent to which series of measurement of same quantity made in same way agree with one another
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solid | fixed volume, fixed shape, molecules vibrate slightly
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liquid | fixed volume, takes shape of container, particles can pass through each other
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gas | takes volume an shape of container, particles are rapid and random
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difference between weight and mass | weight is the force of gravity acting on mass, while mass is the quantity of matter in an object.
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physical change | change that affects only physical properties (ex: melting, boiling, freezing)
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chemical change | change that produces one or more new substances (ex: rusting, precipitation, released gas, emission of light, color change, glow stick)
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physical property | any property of matter that can be measured without changing its chemical nature (ex: mass, density, height, color, texture, boiling point)
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chemical property | property of matter that can be observed only when substances interact (ex: flammability, volatility, radioactivity)
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how are temperature and heat related? | heat is the sum of kinetic energy in a sample of the particles in the matter. temperature is the average kinetic energy in a sample of the particles in the matter.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
kott2
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