Unit 1 Study Guide

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42 Terms

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Matter

anything that has mass and volume

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Independent Variable (IV)

variables that are changed and what you control (x-axis)

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Dependent Variable (DV)

variables that are affected by the change of the IV (y-axis)

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Trend Line / Line of Best Fit

a straight line that shows the general trend of data points on a graph

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Element

an individual square on the periodic table

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Compound

when two or more elements are present on the same molecule

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Mixture

when two or more pure substances are present

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Measurement

the size, length, or amount of something

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Quantitative Data

made with instruments such as rulers, balances, graduated cylinders, beakers, and thermometers

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Qualitative Date

use your senses to observe the results

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Volume

the amount of space that a substance or object occupies

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Mass

the quantity of matter which a body contains

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Temperature

the degree or intensity of heat present in a substance or object

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Pure Substance

an element or compound

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Accuracy

correctness of a result

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Precision

amount of times a result has been repeated

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Conversion Factor

true ratios, represented as fractions - must include units

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Mole

used to count things such as atoms and molecules

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6.022×10²³

Mole Equation

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Graduation

a mark on a measuring tool that tells you how much is present per mark

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K = °C+273.15

Kelvin Equation

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Scientific Notation

used to easily write down very large or very small numbers

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What is 457,790,000 in scientific notation?

4.5779×108

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What is 0.000006 in scientific notation?

6 × 10-6

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What is 0.78395 in scientific notation?

7.8395 × 105

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What is 1.22 × 10-1 in standard notation?

0.122

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What is 3.97 × 10-3 in decimal notation?

0.00397

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What is 4.3 × 102 in decimal notation?

430

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(|accepted-experimental|/accepted)x100

%Error Equation

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Physical Property

a property that can be observed without changing the identity of the substance

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Chemical Property

defines how that substance will react with other materials

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Physical Change

any change that doesn’t change the identity of the substance

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Chemical Change

any changes that change the identity of the substance

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Element

Cu (Copper)

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Compound

NaCl (Sodium Chloride)

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Pure Substance

H2O (Distilled Water)

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Mixture

Air

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Element

Is He (Helium) a compound or element?

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Compound

Is CO2 a compound or element?

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100,000 mg

What is 100 g in mg?

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10,000 mm

What is 0.01 km in mm?

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100 mL

What is 0.1 L in mL?