Barometer
A barometer is a scientific instrument used to measure atmospheric pressure. It is an important tool for meteorologists in predicting weather patterns. There are two main types of barometers: mercury barometers and aneroid barometers.
Mercury Barometer
A mercury barometer consists of a long glass tube filled with mercury, which is inverted into a dish of mercury. The height of the mercury in the tube is used to measure the atmospheric pressure. As the atmospheric pressure changes, the height of the mercury in the tube also changes.
Aneroid Barometer
An aneroid barometer uses a small, flexible metal box called an aneroid cell. As the atmospheric pressure changes, the cell expands or contracts, which is then measured and displayed on the barometer's dial.
Study Guide
- What is a barometer used to measure?
- What are the two main types of barometers?
- How does a mercury barometer work?
- How does an aneroid barometer work?
- Why is a barometer an important tool for meteorologists?
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