Skip to main content    

An official website of the United States government

Here’s how you know

**Official websites use .gov**              A **.gov** website belongs to an official government organization in the United States.            

**Secure .gov websites use HTTPS**              A **lock** (  LockA locked padlock) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.            

https://www.nist.gov/education/meet-measurement-league

            -  Topics  -  All Topics 
-  Advanced communications 
-  Artificial intelligence 
-  Bioscience 
-  Buildings and construction 
-  Chemistry 
-  Climate 
-  Cybersecurity 
-  Electronics 
-  Energy 
-  Environment 
-  Fire 
-  Forensic science 
-  Health 
-  Information technology 
-  Infrastructure 
-  Manufacturing 
-  Materials 
-  Mathematics and statistics 
-  Metrology 
-  Nanotechnology 
-  Neutron research 
-  Performance excellence 
-  Physics 
-  Public safety 
-  Resilience 
-  Standards 
-  Transportation 
 
            -  Publications 
            -  Labs & Major Programs  -  Laboratories    -  Communications Technology Laboratory 
  -  Engineering Laboratory 
  -  Information Technology Laboratory 
  -  Material Measurement Laboratory 
  -  Physical Measurement Laboratory 
-  User Facilities    -  NIST Center for Neutron Research 
  -  CNST NanoFab 
-  Research Test Beds 
-  Research Projects 
-  Tools & Instruments 
-  Major Programs    -  Baldrige Performance Excellence Program 
  -  CHIPS for America Initiative 
  -  Manufacturing Extension Partnership (MEP) 
  -  Office of Advanced Manufacturing 
  -  Special Programs Office 
  -  Technology Partnerships Office 
 
            -  Services & Resources  -  Standards and Measurements    -  Calibration Services 
  -  Laboratory Accreditation (NVLAP) 
  -  Quality System 
  -  Standard Reference Materials (SRMs) 
  -  Standards.gov 
  -  Time Services 
  -  Office of Weights and Measures 
-  Software 
-  Data    -  Chemistry WebBook 
  -  National Vulnerability Database 
  -  Physical Reference Data 
  -  Standard Reference Data (SRD) 
-  Storefront 
-  License & Patents 
-  Computer Security Resource Center (CSRC) 
-  NIST Research Library 
 
            -  News & Events  -  News 
-  Events 
-  Blogs 
-  Feature Stories 
-  Awards 
-  Video Gallery 
-  Image Gallery 
-  Media Contacts 
 
            -  About NIST  -  About Us    -  Leadership 
  -  Organization Structure 
  -  Budget & Planning 
-  Contact Us 
-  Visit 
-  Careers    -  Student programs 
-  Work with NIST 
-  History    -  NIST Digital Archives 
  -  NIST Museum 
  -  NIST and the Nobel 
-  Educational Resources 
 

## Education

-  The Measurement League  Expand or Collapse    -  SI Superheroes Videos 
  -  Video Worksheets 
  -  Coloring Pages 
  -  Valentine's Day Cards 
-  Resources for Parents, Teachers and Students  Expand or Collapse    -  How Do You Measure It? 
  -  Einstein’s General Relativity and Your Age 
  -  What Is the Planck Constant? 
  -  NISTified Movie Posters 
  -  Memes From NIST 
-  Metric Program Resources 
-  Quizzes 
-  NIST in Your Day 
-  Kids Ask, We Answer 
-  NIST Scientists Talk Quantum 
-  Get What You Pay For Video Series 
-  NISTory Video Series 

# Meet the Measurement League

## Share

Facebook

Linkedin

Twitter

Email

## The Superheroes

Credit:

## Monsieur Kilogram

**SI Unit of massSymbol: kg**

Monsieur Kilogram is the master of mass.

Known to maneuver immense objects with ease, he also astonishes foes with the ability to precisely control nano objects.

Working with mass is a *piece* of cake.

Credit:

## Professor Second

**SI unit of timeSymbol: s**

By broadcasting a precise stream of invisible microwaves, Professor Second has the power to fix any clock.

A second is the time it takes for 9,192,631,770 "wiggles" to hit the cesium atoms around her. 

Credit:

## Meter Man

**SI unit of lengthSymbol: m**

With his sharp eyes and stretchy ruler arms, no distance is too big or too small for Meter Man to measure.

A meter is the distance light travels in a tiny fraction of a second.

Credit:

## Ms. Ampere

**SI unit of electric currentSymbol: A**

Ms. Ampere has a shocking amount of power over the flow of electrons—electrical current.

An ampere is the measure of the flow of electrons past a point—about 6 quintillion electrons (that's a 6 followed by 18 zeros!) per second.

Credit:

## Dr. Kelvin

**SI unit of temperatureSymbol: K**

With the ability to speed up or slow down particles, Dr. Kelvin can create and measure any temperature.

The kelvin temperature scale begins at absolute zero, the coldest possible temperature and the point at which even atoms would stand almost perfectly still. Water freezes at 273 K and boils at 373 K.

Credit:

## Candela

**SI unit of brightnessSymbol: cd**

Don't let her small size fool you. Candela's power over light helps to brighten the world.

A candela is about equal to the light given off by a single candle.

Credit:

## The Mole

**SI unit of substanceSymbol: mol**

Able to sniff out and count the atoms of every element, the Mole is the king of chemistry.

Equal to about 600 sextilion (that's a 6 followed by 23 zeros!), a mole is a shorthand way to talk about huge numbers, especially of tiny things.

## The Villain

Credit:

## Major Uncertainty

**Symbol: ?**

An alien invader from parts unknown, Major Uncertainty uses his less-than-trustworthy monkey wrench to generate a dreadful "chaos beam," which causes us to doubt the accuracy and precision of our measurements.

Major Uncertainty feeds on this doubt, which makes him bigger, stronger, and less pleasant to be around.

### HEADQUARTERS

301-975-2000

Webmaster | Contact Us | Our Other Offices

TwitterFacebookLinkedInInstagramYouTubeGiphyRSS FeedMailing List

Feedback

            -  Site Privacy 
            -  Accessibility 
            -  Privacy Program 
            -  Copyrights 
            -  Vulnerability Disclosure 
            -  No Fear Act Policy 
            -  FOIA 
            -  Environmental Policy 
            -  Scientific Integrity 
            -  Information Quality Standards 
            -  Commerce.gov 
            -  Science.gov 
            -  USA.gov 
            -  Vote.gov