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# SI Base Units

### CAVA Chem 302/303 SI Base Units

Question | Answer |
---|---|

Decimal measurement is based on breaking a standard unit into [...]. | Decimal measurement is based on breaking a standard unit into tens. |

The metric system gained popularity after the [...]. | The metric system gained popularity after the French Revolution. |

the French Academy of Sciences developed a useful base-10 system of units called Système International d'Unités ( [...], or International System of Units). | the French Academy of Sciences developed a useful base-10 system of units called Système International d'Unités ( SI, or International System of Units). |

The basis for all SI measurements is the [...] system. | The basis for all SI measurements is the metric system. |

The [...] is the metric base unit for length. | The meter is the metric base unit for length. |

The standard meter (m) is one ten-millionth the distance from the [...] to the North Pole. This length was marked on a brass bar and kept by the French Academy. | The standard meter (m) is one ten-millionth the distance from the equator to the North Pole. This length was marked on a brass bar and kept by the French Academy. |

The [...] is the SI base unit for mass. (*instead of the [...]... for stupid historical reasons... I know, it's dumb.*) | The kilogram is the SI base unit for mass. (*instead of the gram... for stupid historical reasons... I know, it's dumb.*) |

The first metric unit of mass was the [...]. It was defined as the mass of one cubic centimeter of water at 4°C. | The first metric unit of mass was the gram. A gram (g) was defined as the mass of one cubic centimeter of water at 4°C. |

The standard for temperature used to be degrees [...]. | The standard for temperature used to be degrees Celsius. |

The SI base unit for temperature is now the [...]. | The SI base unit for temperature is now the kelvin. |

Metric system units are based on powers of [...]. | Metric system units are based on powers of ten. |

[...]: SI base unit of electric current | ampere (A): SI base unit of electric current |

[...]: SI base unit of light intensity | candela (cd): SI base unit of light intensity |

candela (cd): SI base unit of light [...] | candela (cd): SI base unit of light intensity |

ampere (A): SI base unit of electric [...] | ampere (A): SI base unit of electric current |

[...]: SI base unit of time. This is the only unit that is not based entirely on 10. | second (s): SI base unit of time. This is the only unit that is not based entirely on 10. |

centi = [...] | centi = 1/100 |

mili = [...] | mili = 1/1,000 |

micro = [...] | micro = 1/1,000,000 |

deci = [...] | deci = 1/10 |

deka = [...] | deka = 10 |

hecto = [...] | hecto = 100 |

kilo = [...] | kilo = 1,000 |

mega = [...] | mega = 1,000,000 |

giga = [...] | giga = 1,000,000,000 |

[...]= 1/100 | centi = 1/100 |

[...]= 1/1,000 | mili = 1/1,000 |

[...]= 1,000 | kilo = 1,000 |

the [...] is the SI base unit of number of particles (lesson says "amount of substance", which is misleading) | the mole is the SI base unit of number of particles (lesson says "amount of substance", which is misleading) |

the mole is the SI base unit of [...] (lesson says "amount of substance", which is misleading) | the mole is the SI base unit of number of particles (lesson says "amount of substance", which is misleading) |

the mole is the SI base unit of number of particles (lesson says "[...]", which is misleading) | the mole is the SI base unit of number of particles (lesson says "amount of substance", which is misleading) |

Created by:
mr.shapard