Chemistry Chapter 2 Vocab

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Scientific Method

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Chemistry

19 Terms

1

Scientific Method

A Logical, systematic approach to solving problems through observation

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2

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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3

Hypothesis

a testable prediction

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4

model

an explanation of how phenomena occur and how data or events are related

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5

Theory

a broad generalization that explains a body of facts or phenomena

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6

quantity

something that has magnitude, size, or amount

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7

SI system

International System of units based on the metric system and units derived from the metric system

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8

Weight

A measure of the force of gravity on an object

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9

Derived Units

combinations of SI base units

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10

Volume

The amount of space an object takes up

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11

Density

the ratio of the mass of a substance to the volume of the substance

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12

conversion factor

a ratio derived from the equality between two different units that can be used to convert from one unit to the other

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13

dimensional analysis

a mathematical technique that allows you to use units to solve problems involving measurements

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14

Accuracy

A description of how close a measurement is to the true value of the quantity measured.

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15

Precision

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

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16

significant figures

All the digits that can be known precisely in a measurement, plus a last estimated digit

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17

scientific notation

A method of writing or displaying numbers in terms of a decimal number between 1 and 10 multiplied by a power of 10.

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18

directly proportional

the relationship between two variables whose ratio is a constant value

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19

inversely proportional

A term used to describe the relationship between two variables whose product is constant.

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