Maximum and minimum thermometer is used for measuring

Step 1: Analyze the question The question asks what a maximum and minimum thermometer measures. The name itself is a big clue.

Step 2: Explain the concept A maximum and minimum thermometer (also called Six's thermometer) is an ecological instrument used to record the highest and lowest temperatures reached over a period, usually 24 hours. It contains mercury and alcohol, and small metal indices that are pushed along by the mercury column. One index stays at the highest point reached and the other at the lowest point. After reading, you reset the indices with a magnet.

Step 3: Check each option

• A. Atmospheric pressure: measured with a barometer.
• B. Highest and lowest amount of rainfall: measured with a rain gauge.
• C. Highest and lowest temperature of the day: this is what the maximum and minimum thermometer does.
• D. Light intensity: measured with a light meter (photometer).
• E. Relative humidity: measured with a hygrometer or wet-and-dry bulb hygrometer (psychrometer).

Step 4: Answer The correct option is C, highest and lowest temperature of the day.

Exam tip: Match each instrument to what it measures:

• Barometer → pressure
• Rain gauge → rainfall
• Hygrometer → humidity
• Anemometer → wind speed
• Max/min thermometer → temperature extremes

If the name of the instrument contains "thermometer", the answer almost always involves temperature.