# The metric system is a **system of measuring**. It has three basic units:

m | the meter for length | |

kg | the kilogram for mass | |

s | the second for time |

With those three simple measurements

we can measure nearly everything in the world!

we can measure nearly everything in the world!

Examples:

### Meter (Metre in UK)

The length of this guitar is about 1 meter: | When unfolded this ruler measures 2 meters: | |

### Kilogram

This gold bar has a mass of 1 kilogram. | A dictionary has a mass of about 1 kilogram. |

### Second

1 second is about as long as it takes to say "one thousand and one" |

## Larger or Smaller

But what if we want to talk about really big or really small things?

we learn about it in the next chapter.

see you guys :)

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