Regents Earth Science Test Preparation Practice Relative Humidity

What is the relative humidity when the drybulb temperature is 16°C and the wet-bulb temperature is 10°C?*

(1) 6%

(2) 14%

(3) 33%

(4) 45%

If air has a dry-bulb temperature of 2°C and a wet-bulb temperature of –2°C, what is the relative humidity?*

(1) 11%

(2) 20%

(3) 36%

(4) 67%

The diagram below shows a weather instrument used to determine relative humidity.

What is the relative humidity?*

(1) 40%

(2) 36%

(3) 8%

(4) 4%

Base your answers to questions 4 on the photographs below and on your knowledge of Earth science. One photograph shows a digital device that recorded several weather variables. The second photograph shows two weather instruments, labeled A and B.

reference-tables, pressure, meteorology, weather-variables, standard-1-math-and-science-inquery, velocity-slope-sediment-size-channel-shape-stream-valume-distance-from-the-sun-gravitational-force-period-of-revolution-speed-of-revolution, standard-1-math-and-science-inquery, changing-length-of-a-shadow-based-on-the-motion-of-the-sun fig: esci82019-examw_g13.png

Based on the outside air temperature and relative humidity shown on the digital device, what is the approximate dewpoint for the time shown on the device?*

(1) 8°C

(2) 12°C

(3) 18°C

(4) 31°C

A dry-bulb temperature of 30°C and a wet-bulb temperature of 29°C were recorded at a weather station. What are the relative humidity and the most likely weather conditions?*

(1) Relative humidity is 29% with clear skies.

(2) Relative humidity is 29% with a good chance of snow.

(3) Relative humidity is 93% with clear skies.

(4) Relative humidity is 93% with a good chance of rain.

What is the relative humidity if the dry-bulb temperature is 26°C and the wet-bulb temperature is 18°C?*

(1) 13 %

(2) 33 %

(3) 45 %

(4) 51 %

What is the relative humidity if the dry-bulb temperature is 16°C and the wet-bulb temperature is 10°C?*

(1) 45%

(2) 33%

(3) 14%

(4) 4%

The diagram below represents a sling psychrometer.

reference-tables, relative-humidity, meteorology, weather-variables, meteorology, dewpoint-humidty-cloud-formation, standard-1-math-and-science-inquery, changing-length-of-a-shadow-based-on-the-motion-of-the-sun, standard-6-interconnectedness, models fig: esci62022-exam_g14.png

Based on the wet-bulb temperature and the dry-bulb temperature, what is the approximate relative humidity?*

(1) 6%

(2) 8%

(3) 30%

(4) 60%

The diagram below represents the wet-bulb and dry-bulb temperatures on a sling psychrometer.

What was the relative humidity of the air when these temperatures were recorded?*

(1) 5%

(2) 17%

(3) 20%

(4) 63%

The data table below shows the dry-bulb and wet-bulb temperatures measured with a psychrometer on four different days at the same location.

According to the data shown in the table, which day had the highest relative humidity?*

(1) 1

(2) 2

(3) 3

(4) 4

Base your answers to questions 11 on the weather map below and on your knowledge of Earth science. On the weather map, the location of the center of a high-pressure system (H) and a front are shown. Isobar values are labeled in millibars (mb). Weather station models represent the weather conditions at Atlanta, Georgia, and Tampa, Florida.

reference-tables, key-to-weather-map-symbols, meteorology, presentation-of-weather-data, standard-1-math-and-science-inquery, changing-length-of-a-shadow-based-on-the-motion-of-the-sun, standard-6-interconnectedness, models fig: esci12018-examw_g53.png

Describe one piece of evidence shown on the map that indicates that Tampa, Florida, has a high probability of precipitation. [1]*

Base your answers to questions 12 on the diagram below, which shows the windward and leeward sides of a mountain range. Arrows show the movement of air over a mountain. Points A and B represent locations at sea level on Earth’s surface.

meteorology, measuring-weather-variables, meteorology, dewpoint-humidty-cloud-formation fig: esci12013-exam_g44.png

What is the relative humidity at the base (bottom) of the cloud on the windward side of the mountain? [1]

Base your answers to questions 13 on the diagram below and on your knowledge of Earth science. The diagram represents a weather balloon as it rises from Earth’s surface to 1000 meters (m). The air temperature and wet-bulb temperature values in degrees Celsius (°C) and the air pressure values in millibars (mb) are given for three altitudes.

meteorology, measuring-weather-variables, standard-6-interconnectedness, models fig: esci82016-examw_g38.png

Determine the dewpoint and the relative humidity of the air at Earth’s surface. [1]

Dewpoint: ______________°C Relative humidity: ________%*