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Science Summaries
Metrology

Measurement Scales
Comparison Chart

by Vaughn Aubuchon

When one discusses scales, they usually refer to weight scales, which measure pounds and kilograms. This chart summarizes ten other various scales of measurement.

Geology

Meteorology

Music - Psychology

Chemistry - Physics

Achievement - Physics
.

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300

140




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 GEOLOGY Scales

Geology

-

Richter
Earthquake Scale

Mohs
Hardness Scale

0

 Undetectable

<1

 Softer than talc

1

No damage

1

Talc

2

No damage

2

Gypsum (fingernail)

3

Little damage

3

Calcite (penny)

4

Light damage

4

Fluorite

5

Moderate damage

5

Apatite (steel)

6

Mod.-Heavy damage

6

Feldspar (glass)

7

Heavy Damage

7

Quartz

8

Very Heavy Damage

8

Topaz (160)

9

Total destruction

9

Corundum (250)

10

Never seen

10

Diamond (1000)

20

140

20

30

130

100 - 450




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 METEOROLOGY Scales

Meteorology

-

Saffir-Simpson
Hurricane Scale

Fujita
Tornado Scale

0 - 73 MPH

0 - 39 MPH

Categ. 1

>74 MPH

F0

40 - 72 MPH

Categ. 2

>96 MPH

F1

73 - 112 MPH

Categ. 3

>111 MPH

F2

113 - 157 MPH

Categ. 4

>131 MPH

F3

158 - 206 MPH

Categ. 5

>155 MPH

F4

207 - 260 MPH

F5

261 - 318 MPH

F6

319 - 379 MPH

60

100

20

40

120

100 - 450




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 IQ Scale - Music Scale

Psychology

Music

-

Intelligence
IQ Scale
Diatonic Scale

130+

Very Superior

1f

C

120 - 129

Superior

D

110 - 119

High Average

3rd

E

100 - 109

Average

4th

F

90 - 99

Average

5th

G

80 - 89

Low Average

6th

A

70 - 79

Borderline

7th

B

<70

Very Low

2f

C

70

110

20

50

60

100 - 450




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 pH Scale - SG Scale

Chemistry

Physics

-

pH Scale
Specific Gravity Scale

0

0 (acidic)

<1

 lighter than water

1

1

1

water

2

2

2

brick, concrete

3

3

3

aluminum

4

4

4

barium

5

5

5

 

6

6

6

arsenic

7

7 (neutral)

7

Iron, tin, zinc

8

8

8

brass, bronze

9

9

9

copper, nickle

10

10

10

silver

11

11

11

lead

12

12

12

 

13

13

13

mercury

14

14 (basic)

14

 

15

 

16

 

17

 

18

uranium

19

gold

20

tungsten

21

platinum

22

iridium

40

80

20

60

140

100 - 450




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 Achievement - Temperature Scales

Achievement

 Physics

-

Grading Scale
 Temperature Scales
A

Excellent

K
C
F
B

Good

373º
100º
212º
C

Average

310º
37º
98.6º
D

Poor

298º
25º
77º
F

Failed

273º
32º
inc

Incomplete

233º
-40º
-40º

-273º
-459º

50

80

40

50

70

50

100 - 450



DISCLAIMER
Although the author has tried to be as accurate as possible, errors are possible.
I could not find a simplified online table like the above. So, I made this measurement scales chart, to help myself understand the various measurement scales. I hope that it helps you.

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This Vaughns Measurement Scales Chart
web page was last updated on 2017-10-28.