Вопрос по английскому языку:
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Read The Timeline of Timekeeping and complete the text with the timekeeping devices in exercise 1.
Timekeeping devices: atomic clock, candle clock, hourglass, mechanical clock, pendulum clock, quartz wristwatch, sundial, water clock.
The Timeline of Timekeeping
Shadow clocks were used for thousands of years before the first ____ appeared in ancient Egypt in around 1500 BC. They show the time by displaying the position of a shadow on a flat surface.
Basic _____appeared around the same time as shadow clocks. A passage of time is measured by how long it takes water to fill or empty from a vessel.
In a similar way to water clocks, ____ burning fat. They first appeared in around 500 AD. ____ improved on these by using fine sand that was reusable.
Early _____ began to appear in Europe in the 13th century. Falling weights drove the cogs and gears. Initially, they didn't have a clock face but signalled the hour with a bell.
As technology improved, clocks became more accurate and in 1656, the _____ was invented. A long metal weighted line drove the clock by swinging from side to side.
1927 saw a major development in precision timekeeping when the first ____ was built. When electricity is applied to the crystal it vibrates at a precise frequency which can be measure time with great accuracy.
Since the 1950s, ____ have become the world's most accurate clocks. They work by measuring the electromagnetic signals of electrons when they change energy levels.
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- 09.12.2020 10:21
- Английский язык
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Ответ:
The Timeline of Timekeeping
Shadow clocks were used for thousands of years before the first sundial appeared in ancient Egypt in around 1500 BC. They show the time by displaying the position of a shadow on a flat surface.
Basic water clock appeared around the same time as shadow clocks. A passage of time is measured by how long it takes water to fill or empty from a vessel.
In a similar way to water clocks, hourglass, burning fat. They first appeared in around 500 AD. candle clock improved on these by using fine sand that was reusable.
Early mechanical clock began to appear in Europe in the 13th century. Falling weights drove the cogs and gears. Initially, they didn't have a clock face but signalled the hour with a bell.
As technology improved, clocks became more accurate and in 1656, the pendulum clock was invented. A long metal weighted line drove the clock by swinging from side to side.
1927 saw a major development in precision timekeeping when the first quartz wristwatch was built. When electricity is applied to the crystal it vibrates at a precise frequency which can be measure time with great accuracy.
Since the 1950s, atomic clock have become the world's most accurate clocks. They work by measuring the electromagnetic signals of electrons when they change energy levels.
- 09.12.2020 11:05
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