The system used in the U.S. is not as logical as that used in other countries (like Great Britain, France, and Germany). In these other countries, a billion

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are needed to see this picture. The system used in the U.S. is not as logical as that used in other countries (like Great Britain, France, and Germany). In these other countries, a billion (bi meaning two) has twice as many zeros as a million, and a trillion (tri meaning three) has three times as many zeros as a million, etc.

Zeros U.S. & scientific community Other countries3 thousand thousand6 million million9 billion 1000 million (1 milliard)12 trillion billion15 quadrillion 1000 billion18 quintillion trillion21 sextillion 1000 trillion24 septillion quadrillion27 octillion 1000 quadrillion30 nonillion quintillion33 decillion 1000 quintillion36 undecillion sextillion39 duodecillion 1000 sextillion42 tredecillion septillion45 quattuordecillion 1000 septillion48 quindecillion octillion51 sexdecillion 1000 octillion54 septendecillion nonillion57 octodecillion 1000 nonillion60 novemdecillion decillion63 vigintillion 1000 decillion









1 mL = 1 cm31 milliliter is the same volume as 1 cubic centimeter.

1 mL of water has a mass of approximately 1 gThe mass of 1 milliliter of water is approximately 1 gram.

1 L of water has a mass of approximately 1 kgThe mass of 1 liter of water is therefore approximately 1 kilogram.

1 m3 of water has a mass of approximately 1 tThere are 1000 liters in a cubic meter, so the mass of 1 cubic meter of water is approximately 1000 kilograms or 1 metric ton.

The mass of a nickel is 5 gA US nickel weighs 5 grams, and a penny weighs 2.5 grams.

A typical doorknob is 1 m highAlthough there's no precise standard for doorknob heights, they're often about 1 meter above the floor.

The diameter of a CD or DVD is 12 cmA CD or DVD is 12 centimeters (120 millimeters) across. The diameter of the center hole is 15 millimeters.

1 ha is 1002 m21 hectare is 10 000 square meters, equivalent to the area of a square 100 meters on a side. A football field is about 100 meters long, so imagine a square the length of a football field on each side, and th











Particle Type Typical Diameter(mm) Volume relative to cloud dropCloud Droplet 0.012 1Large Cloud Droplet 0.1 579Mist Droplet 0.5 72,300Drizzle Drop 1.2 1,000,000Raindrop 3.0 15, 600,000Large Raindrop 6.0 125,000,000

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Raindrop the Alpaca

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The system used in the U.S. is not as logical as that used in other countries (like Great Britain, France, and Germany). In these other countries, a billion