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16 Cards in this Set
- Front
- Back
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Scientific Method |
The steps scientists use to solve problems and make discoveries |
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Hypothesis |
An educated guess |
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Experimental Design |
Scientists perform the same procedure over and over again during an experiment , but they change one variable each time to see its effect. |
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atom |
the smallest particle that can still be considered an element |
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ion |
an atom or group of atoms with an electric charge, either +/- |
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dependent variable |
the observed variable in an experiment or study whose changes are determined by the presence of one or more independent variables |
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molecule |
a neutral group of atoms joined by covenant bonds |
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compound |
a combination of atoms arranged in a specific ratio that form a new substance |
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reactants |
a substance that undergoes a chemical change |
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products |
a substance that forms after chemical reactions |
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conservation of mass |
matter is not created or destroyed during a chemical reaction |
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independent variable |
the one factor a scientist changes in an experiment |
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atomic number |
the number of protons in the nucleus of an atom |
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atomic weight |
the average mass of all the isotopes of an element |
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mole |
the numbers of atoms of a substance equal to the number of atoms in 12g of carbon 12: 6.022 x 10 23 atoms |
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bias |
influence in favor of or against something usually in a way considered to be unfair |
