Unit 1 test Flashcards

1
Q

mass

A

a measurement of the amount of matter an object contains

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2
Q

volume

A

a measure of space occupied by the object.

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3
Q

extensive property

A

a property that depends on the amount of matter in a sample.

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4
Q

intensive property

A

a property that depends on the type of matter in a sample no the amount.

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5
Q

substance

A

matter that has a uniform and definite composition.

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6
Q

physical property

A

a quality or condition of a substance that can be observed or measured without changing the substances composition

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7
Q

solid

A

a form of matter that has definite shape and volume (particles are packed tightly together)

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8
Q

liquid

A

a form of matter that has an indeifinite shape and flows but has a fixed volume (particles are free to flow)

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9
Q

gas

A

a form of matter that takes both the shape and volume of its container (particles are far apart)

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10
Q

physical change

A

some properties of a material change but the compostion of the material does not change.

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11
Q

mixture

A

physical blend of two or more components.

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12
Q

heterogeneous mixture

A

a mix in which the composition is not uniform throughout.

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13
Q

phase

A

term used to describe particles sample with uniform compostion and properties

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14
Q

homogeneous mixture

A

a mix in which the composition is uniform throughout.

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15
Q

filtration

A

process separating solid from liquid in hetero geneous mixture.

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16
Q

distillation

A

liquid boiled to produce a vapor that is then condensed into a liquid

17
Q

element

A

simplest form of matter

18
Q

compound

A

substance that contains two or more elements that are chemically combined.

19
Q

chemical change

A

a change that produces matter with a different compostion that the original matter

20
Q

chemical property

A

the ability of a substance to undergo a specific chemical change

21
Q

chemical reaction

A

one or more substances change into one or more new substance.

22
Q

reactant

A

substance present at the start of the reaction

23
Q

product

A

substance produced in the reaction

24
Q

precipitate

A

a solid that forms and settles out of a liquid mixture

25
Q

law of consevation of mass

A

in any physical change of chemical reaction mass is conserved (mass is neither created or destroyed)

26
Q

measurement

A

a quantity that has both a number and a unit

27
Q

accuracy

A

measure of how close a measurement come to the actual value of whatever is measured

28
Q

precision

A

a measure of how close a series of measurements are to one another

29
Q

accepted value

A

correct value for the measurement based on reliable references

30
Q

experimental value

A

value measured in lab

31
Q

percent error

A

((experimental value - accepted value)/ divided by accepted value) * 100

32
Q

si unit of volume

A

liter

33
Q

si unit of mass

A

kg

34
Q

weight

A

force that measures the pull on a given mass

35
Q

density

A

mass divided by volume m/v

36
Q
A