Using the Symbol Key from the next slide…fill in this chart at your seat.

Slides:

Advertisements

Similar presentations

HUMIDITY AND DEW POINT.

Advertisements

After completing this Lesson, you will be able to answer: 1. What is humidity? 2. What is relative humidity? 3. How relative humidity is measured? 4. What.

Water in the Atmosphere. Humidity Humidity is a measure of the amount of water vapor in the air. Air’s ability to hold water vapor depends on its temperature.

A TMOSPHERIC M OISTURE Visualizing Physical Geography Copyright © 2008 John Wiley and Sons Publishers Inc. Water and the Hydrosphere Three States.

After completing this Lesson, you will be able to answer: 1. What is humidity? 2. What is relative humidity? 3. How relative humidity is measured? 4. What.

Unit 4-1: Humidity and Dew Point. REMOVE HEAT Evaporation As molecules in liquid form absorb heat, they evaporate. –Evaporation is the phase change from.

Water in Earth’s Atmosphere. Phase changes To evaporate, water must absorb energy. This energy goes into changing the liquid particles that are close.

There are 5 basic types of maps: 1.Pressure 2.Aviation 3.Temperature 4.Streamline 5.Station Model.

Saturation = filled to capacity

Chapter 23 Section 1 Handout

How much moisture is in the air relative to how much it can hold

1._____process that forms clouds (water cycle 2) 2._____ process that adds heat and changes liquid water to water vapor (water cycle) 3._____what powers.

1. Explain the characteristics of each weather element; 2. Know the instruments used for measuring the weather elements; 3. Describe measuring of weather.

►Weather forecasting dates back to 650 B.C. The Babylonians observed cloud patterns to predict weather. ►Aristotle described weather patterns in Meteorologica.

HUMIDITY AND DEW POINT. CONDENSATION � H2O can exist in solid, liquid, or gaseous states. Change from liquid to gas is evaporation. Change from gas to.

Relative Humidity. Humidity  the measure of the amount of water in the air  high humidity =lots of moisture in the air.

Meteorology: the study of the entire atmosphere, including weather.

Atmospheric Moisture. How does the moisture get in the atmosphere?? EVAPORATION – liquid to a gas TRANSPIRATION – process of water being taken in and.

Aim: What is Humidity and Dew Point? Do Now: What instruments do scientist use to measure air pressure? Explain why in the daytime a breeze comes from.

1._____process that forms clouds (water cycle 2) 2.____ layer of atmosphere that weather occurs in (atm layers) 3._____ process that adds heat and changes.

Bell work Observe two glasses of water. One is filled with ice water, and one is filled with warm water. Why do water droplets form on the outside of the.

Essential Question: How does WATER in the atmosphere affect weather and climate? What is the most important gas in the atmosphere for weather? What is.

Humidity and Dew Point. Foldable Make a two flap foldable one side Relative Humidity and the other side Dew Point Should Contain What it is How it is.

Humidity is the amount of water vapor in the air. It is measured in grams of water vapor per kilogram of air.

I. Water’s Changes of State 18.1 Water in the Atmosphere  A) Precipitation is any form of water that falls from a cloud.  1) When studying the ATM, H20.

Dew Point & Relative Humidity How to use a Psychrometer.

Weather Lesson Four Moisture. ATMOSPHERIC MOISTURE Gaseous water is called WATER VAPOR. Major source of atmospheric water vapor is the OCEANS (70%). Sources.

Atmospheric Humidity.

HUMIDITY AND DEW POINT.

Water in the Air.

Humidity and Dew Point.

Do Now: Air rises ___________ and ____________

Atmospheric Moisture: Humidity

Atmospheric Moisture 24.1.

Unit 4 Weather ©Mark Place,

Aim: What is relative humidity?

PSYCHOMETRICS INTRODUCTION INDEXES PSYCHOMETRIC CHART INTRODUCTION:  PSYCHOMETRICS IS THE STUDY OF MOIST AIR.  THE PSYCHOMETRIC CHART IS A GRAPHIC REPRESENTATION.

Weather Part 3 Humidity.

Bell work Observe two glasses of water. One is filled with ice water, and one is filled with warm water. Why do water droplets form on the outside of the.

Water & Humidity Earth Science – S1.

VOCABULARY – WEATHER ADIABATIC COOLING HURRICANE DROUGHT

HUMIDITY AND DEW POINT.

How would you describe humidity in your own words?

Atmospheric Moisture Earth Science.

What is the most important gas in the atmosphere?

Water in the Atmosphere

L.O: SWBAT to determine dewpoint and relative humidity.

Water’s Changes of State

Water’s Changes of State

Water in the Atmosphere

Pick up worksheet from front table and glue into notebook.

Dew Point and Cloud Formation

Humidity Water in the Air.

Dew Point and Cloud Formation

Spot the Differences (14)

Water in the Atmosphere

Weather ©Mark Place,

Chapter 12 Section 3 How is relative humidity measured?

Humidity & Our Weather 13.2 Energy and Water (p )

Chapter 12 Section 3 How is relative humidity measured?

Water in the Atmosphere

6.3: Finding Moisture in the Atmosphere

Water in the Atmosphere

Relative Humidity (Evaporation).

Moisture in the Atmosphere

Atmospheric Moisture Earth Science.

DYK: **The atmosphere contains only about 0.001% of the total volume of water on the planet (about 1.46 x 109 km3). **The rate at which water evaporates.

Presentation transcript:

Using the Symbol Key from the next slide…fill in this chart at your seat.

Humidity “An excuse for the 80s”

What is Humidity? Humidity refers to the amount of moisture (water vapor) in the surrounding air.

Relative Humidity RATIO of the amount of moisture in the air compared with the amount of moisture the air can hold at that temperature and pressure. Expressed as a percentage.

I would rather be in the desert than in North Carolina during July!!! If the air is at 90% relative humidity, sweat will not evaporate into the air. As a result, we feel much hotter than the actual temperature. If the relative humidity is low, we can feel much cooler than the actual temperature. because our sweat evaporates easily, cooling the body.

We are very sensitive to humidity We are very sensitive to humidity. Sweating keeps our body cool and maintain its current temperature.

AGHHH my hair is HUGE, WHY? The length of a strand of human hair changes with different relative humidities. As the relative humidity increases, hair becomes longer, and as the humidity drops it becomes shorter. On very humid days, your hair actually becomes longer and this extra length causes the frizziness that gives us bad hair days.

How is Relative Humidity Measured? Sling Psychrometer It consists of two identical mercury thermometers: Evaporating water from the wick absorbs heat from the thermometer bulb, causing the thermometer reading to drop.

Find the difference between the DRY bulb and the WET bulb on the two thermometers Use the Relative Humidity Table Where the DRY bulb temperature and the DIFFERENCE between the two thermometers intersects…is your relative humidity. Example – If the DRY bulb temperature reading is 22°C and the DIFFERENCE between the two thermometers is 6°…the relative humidity is 53%

Practice Problems Dry bulb = 12° Wet bulb = 7° 48% 2. Dry bulb = 22° 83% 3. Dry bulb = -10° Wet bulb = -7° 0%

Why Care about Relative Humidity? If we can’t sweat…we could overheat and DIE!!

Dew Point The temperature that air would need to cool to condense the water vapor into liquid water.

Dew Point is determined the SAME EXACT WAY that Relative Humidity is calculated…a Sling Psychrometer. You just use a DIFFERENT chart… the DEWPOINT chart..DUH!! Dry bulb = 12° Wet bulb = 7° 1° 2. Dry bulb = 22° Wet bulb = 19° 17°