🔍 Key Concepts

• Atmospheric pressure instruments used on ships and in weather observations • Difference between barometer and barograph • What the word atmospheric implies about what is being measured

💭 Think About

• Which of these instruments are specifically designed to measure pressure in the atmosphere, not something else? • Does any option record changes over time versus just indicating the current pressure? How does that affect whether it still measures atmospheric pressure? • If more than one choice measures atmospheric pressure, what does that suggest about an option like "All of the above"?

✅ Before You Answer

• For each instrument, confirm whether its primary purpose is to measure atmospheric pressure. • Identify which instrument(s) actually contain or are based on a barometer. • Make sure you are not confusing recording pressure over time with measuring the pressure itself.