# A Metric System Knowledge Quiz

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Welcome to "A Metric System Knowledge Quiz." The French standards meter originated in the 1970s as 1/ten-millionth of the distance from the equator to the North pole along a meridian through Paris. But it's history started centuries ago with the work of Nicolaus Copernicus in 1543. So, what do you know about the meter? Take our quiz and find out now.

• 1.
• A.

Inches

• B.

The Toise of Paris

• C.

The Eiffel Tower

• D.

Feet

B. The Toise of Paris
• 2.
• A.

It's a unit of measure of length

• B.

It's a unit of measure of a circle

• C.

It's a unit of measure of a cube

• D.

It's a unit of measure of time

A. It's a unit of measure of length
• 3.

### What was the general scaling system?

• A.

The archives

• B.

The metre of renaissance

• C.

The metre des archives

• D.

The metre of Rousseau

C. The metre des archives
Explanation
The correct answer is "The metre des archives". The metre des archives was a general scaling system used in archives. This system was specifically designed for measuring and scaling documents in archives, ensuring accurate and consistent measurements. It was widely used during the time period in question and was an important tool for organizing and categorizing documents in archives.

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• 4.

### When was the metric system adopted in France?

• A.

In 1802

• B.

In 1780

• C.

In 1770

• D.

In 1799

D. In 1799
Explanation
In 1799, the metric system was adopted in France. This adoption was a result of the French Revolution, which aimed to standardize measurements and create a more rational and universal system. The metric system was designed to be decimal-based, making it easier to use and understand. Its adoption in France marked a significant shift away from the traditional system of measurement and paved the way for its eventual global acceptance.

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• 5.
• A.

It's the system of unites based on distance

• B.

It's the system of units based on time

• C.

It's the system of units based on metre

• D.

It's the system of unites based on liters

C. It's the system of units based on metre
• 6.

### When did the metric system become the sole legal system of weights and measures?

• A.

From 1830

• B.

From 1820

• C.

From 1801

• D.

From 1810

C. From 1801
Explanation
The metric system became the sole legal system of weights and measures from 1801. This means that starting from that year, all measurements in weights and measures were required to be done using the metric system.

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• 7.

### What is krypton?

• A.

It's a liquid at room temperature allowing for easier isotopic enrichment

• B.

It's a rock

• C.

It's a gas at room temperature allowing for easier isotopic enrichment.

• D.

It's a planet

C. It's a gas at room temperature allowing for easier isotopic enrichment.
Explanation
Krypton is a gas at room temperature, which makes it easier to carry out isotopic enrichment processes. Isotopic enrichment involves separating and concentrating specific isotopes of an element, and it is typically done in the gas phase. The fact that krypton is a gas means that it can be easily manipulated and processed to enrich specific isotopes, making it a suitable element for this purpose.

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• 8.

### What is the original definition of the metre?

• A.

It's a stretched distance.

• B.

It's the length equal to 1 wave length in vacuum of radiation corresponding to the transition between the levels 2p10 and 5d5 of the krypton 86 atom.

• C.

It's the length equal to 1650 763.73 wavelengths in vacuum of radiation corresponding to the transition between the levels 2p10 and 5d5 of the krypton 86 atom.

• D.

It's the length equal to 165 wavelengths in vacuum of radiation corresponding to the transition between the levels 2p10 and 5d5 of the krypton 86 atom.

C. It's the length equal to 1650 763.73 wavelengths in vacuum of radiation corresponding to the transition between the levels 2p10 and 5d5 of the krypton 86 atom.
Explanation
The original definition of the metre is the length equal to 1650 763.73 wavelengths in vacuum of radiation corresponding to the transition between the levels 2p10 and 5d5 of the krypton 86 atom.

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• 9.

### What is the 1983 and more modern definition of the metre?

• A.

It's the length of the path traveled by light in a vacuum in 1/299,792,458 of a second.

• B.

It's the length of the path traveled by light in a vacuum in 1/500 of a second.

• C.

It's the length of the path traveled by light in a vacuum in 1/230 of a second.

• D.

It's a stretched distance

A. It's the length of the path traveled by light in a vacuum in 1/299,792,458 of a second.
Explanation
The correct answer is the first option: "It's the length of the path traveled by light in a vacuum in 1/299,792,458 of a second." This answer accurately describes the 1983 and more modern definition of the meter, which is based on the speed of light in a vacuum. It states that the meter is defined as the distance that light travels in 1/299,792,458 of a second. This definition provides a precise and standardized measurement for the meter.

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• 10.

### What's the purpose of airy points?

• A.

They are used to measure the condensation phase of liquids.

• B.

They are used to measure the pressure in liquids.

• C.

They are used to measure the density of the air.

• D.

They are used for precision measurement.

D. They are used for precision measurement.
Explanation
Airy points are used for precision measurement. These points are created by focusing a beam of light through a small hole onto a surface, resulting in a pattern of concentric rings. By measuring the size and spacing of these rings, precise measurements can be made. Airy points are commonly used in fields such as optics and astronomy to accurately determine the position and alignment of objects.

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