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23 Cards in this Set
- Front
- Back
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element
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a substance that cannot e broken by chemical or physical means
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atom
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smallest part of element that has all characteristics of the element
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nucleus
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the center of an atom made of protons and neutrons-contains most of mass in atom
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proton
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particle with a positive charge in the nucleus with mass
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neutron
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particle with a neutral charge in the nucleus with mass
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electorn
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particle with a negative charge surrounding the nucleus with no mass
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atomic number
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number of protons in atom (defines element)
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mass number
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combined number of protons and neutrons in the nucleus of an atom
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atomic mass
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average of the mass numbers of the isotopes of an element
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isotope
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atoms of the same element that have different mass numbers and the same chemical properties
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molecule
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composed of 2 or more atoms held together
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What measurement can the unit "grams" be used for?
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mass
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What measurement can the unit "mL" be used for?
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volume
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What measurement can the unit "lbs" be used for?
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mass
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What measure can the unit "lbs/mL" be used for?
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density
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List three versions of the density formula using mathematical symbols.
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D=M/V, M=DxV, & V=M/D
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What is the density of water?
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1 gram per cubic centimeter or 1 gram per mililiter
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What is the density of a fluid that occupies a volume of 60 mL and has a mass of 12 grams?
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5 grams per mililiter
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If the density of a certain plastic used to make a bracelet is 1.20 grams per cubic centimeter, what mass would a bracelet of .5 cubic centimeters have? Would this bracelet float or sink in water?
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.60 grams per cubic centimeter. It would float in water
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State the components of a scientific paper in order of first to last.
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Title, abstract, introduction, materials & methods, results, disscussion, acknowledgements, literature cited, appendix
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What are the results in a scientific paper, and what do they include?
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Description of findings; includes charts and graphs
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What is an independent variable?
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The variable the experimenter controls or chooses.
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What is a dependent variable?
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The outcome variable-the variable that you think may be affected by the independent variable
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