## Hourglass vs. Sundial: Which Time-Measuring Device Figures?
1. What is an hourglass used for?
2. How does an hourglass work?
3. What is a sundial?
4. How does a sundial work?
5. Which time-measuring device is more accurate?
## Answers.
1. An hourglass is a time-measuring device used to track the passage of time.
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2. An hourglass typically consists of two glass bulbs connected by a narrow neck that allows sand to flow from one bulb to the other. When the hourglass is turned over, gravity causes the sand to flow from one bulb to the other, marking the passage of time.
3. A sundial is a device that uses the position of the sun to indicate the time of day.
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4. A sundial has a flat plate with a pointer, called a gnomon, that casts a shadow onto the plate. As the sun moves across the sky, the shadow moves, indicating the time.
5. In terms of accuracy, sundials are generally less precise than hourglasses. Hourglasses can measure time intervals more accurately, while sundials rely on the position of the sun, which can be affected by clouds, shade, and the time of year. However, both devices have their own unique charm and historical significance.
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