Chemistry - Scientific Process, Measurement & Calculations Quiz

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33 Terms

1
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SI unit, purpose and tool for mass

SI Unit = kilograms (kg)

Measures amount of matter

Tool = scale/triple beam balance

2
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SI unit, purpose and tool for weight

SI Unit = pounds (lbs)

Measures the pull of gravity on matter

Tool = balance/scale

3
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SI unit, purpose and tool for length

SI unit = meters (m)

Measures the distance between two points

Tool = meter stick

4
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SI unit, purpose and tool for time

SI unit = seconds (s)

Measures continuous existence or passing events

Tool = stopwatch/timer

5
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SI unit, purpose and tool for temperature

SI unit = Kelvin (K)

Measures the amount of heat

Tool = thermometer

6
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SI unit, purpose and tool for area (derived unit)

SI unit = meters squared (m2)

Measures the amount of space on a surface (2D)

Tool = various measuring tools

7
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SI unit, purpose and tool for volume (derived unit)

SI unit = meters cubed (m3)

Measures the amount of space an object/substance occupies (3D)

Tool = graduated cylinders, beakers, pipettes

8
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SI unit, purpose and tool for density (derived unit)

SI unit = kilograms per meter cubed (kg/m3)

Measures the amount of matter in a given volume

Tool = Balance, graduated cylinders

9
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Accuracy

How close a measurement comes to the actual value of what is measured (ex: how close are the darts to bullseye?)

10
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Precision

  1. In a data set, how close measurements are to each other.

  2. In a single measurement, specific range of value or distance between two values.

(ex: how close are the darts to each other?)

11
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How many sig figs are in 12.300?

5 sig figs (nonzero digits and zeroes after decimal point & after a nonzero digit)

12
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How many sig figs are in 2030?

3 sig figs (nonzero digits, zero between nonzero digits, last zero only for placement)

13
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How many sig figs are in 0.0517?

3 sig figs (zeroes before decimal point and nonzero numbers)

14
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Hypothesis

A proposed explanation for a phenomenon that can be tested.

15
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Law

A description of observed phenomenon (what, supported by math)

16
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Theory

A repeatedly tested explanation of the natural world (why)

17
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Independent variable

Part of experiment that is changed by experimenter, it affects another part

18
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Dependent variable

Part of experiment that changes due to IV. (what is measured/observed)

19
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1 base unit = ___ centi-

100

20
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1 base unit = ____ mili-

1000

21
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1 base unit = _____ micro

1,000,000

22
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____ base unit = 1 kilo-

1000

23
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____ base unit = 1 mega-

1,000,000

24
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<p>Beaker use</p>

Beaker use

Holding, mixing, and heating liquids

25
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<p>Erlenmeyer flask use</p>

Erlenmeyer flask use

Mixing, holding, heating liquids

26
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<p>Test tube use</p>

Test tube use

Used to hold small amounts of substances

27
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<p>Graduated cylinder use</p>

Graduated cylinder use

Measuring liquids

28
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<p>Pipette</p>

Pipette

Transferring liquids

29
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Balance/scale

Measures mass

30
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Thermometer

Measures temperature

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Density =

mass/volume

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Formula for percent error

|(Measured Value - Actual Value) / Actual Value| × 100%.

33
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