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Water in the Atmosphere

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Water in the Atmosphere Chapter 16 Section 4 Pages 545-550 Congratulations on being able to correctly identify the types of clouds! You are on your way to becoming a ... – PowerPoint PPT presentation

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Title: Water in the Atmosphere


1
Water in the Atmosphere
  • Chapter 16 Section 4
  • Pages 545-550

2
  • Humidity- A measure of the amount of water vapor
    in the air.
  • Relative Humidity- The percentage of water vapor
    in the air compared to the maximum amount that
    the air can hold at that temperature.

3
  • If 10C Holds a maximum of 8 grams of water
    vapor.
  • What is the humidity if 8 grams of water vapor
    are in the air?

4
  • If 10C Holds a maximum of 8 grams of water
    vapor.
  • What is the humidity if 8 grams of water vapor
    are in the air?
  • If the air is holding 4 grams of water vapor,
    what is the relative humidity?.

5
  • The temperature.
  • Warm air is less dense.
  • Has more room to hold water vapor.
  • Cold air is more dense
  • Has less space to hold water vapor

6
  • Psychrometer- An instrument used to measure
    relative humidity, consisting of a wet-bulb
    thermometer, and a dry-bulb thermometer.
  • Evaporation is a ____________ process.

7
  • If the relative humidity is high, will there be
    much of a temperature difference between the
    thermometers and why?

8
  • Dew Point- The temperature at which condensation
    begins.
  • If the temperature dew point
  • Relative humidity 100

9
  • 1. Air is warmed and rises
  • Infrared Radiation Heats Surface.
  • Evaporates water.

10
  • 2. Warm, Moist air rises.
  • Air Expands as it rises.
  • Air Cools at the Dry Adiabatic Lapse Rate (Dry
    ALR 10C for every 1km)

11
  • 3. Condensation Occurs.
  • Must occur on condensation nuclei
  • Dust
  • Salt
  • Smoke

12
  • 4. Condensation Level
  • The level at which condensation occurs.
  • Relative humidity 100
  • Temp and Dew Point are

13
  • 5. Cloud Forms
  • Air now cools at the Wet ALR 5-9C
  • Cools slower because condensation releases some
    heat.

14
CloudIdentification
  • Chapter 16 Section 4
  • Pages 548-550

15
  • Click on an Icon to navigate

16
  1. Use the arrows to navigate through this
    PowerPoint
  2. Click through the following slides on clouds and
    copy the notes onto your note sheet.
  3. Be sure to sketch the shape of each cloud in your
    notes as well.
  4. Take the Cloud Quiz.

17
  • Means heap or mass.
  • Fair weather clouds.
  • Can grow to be very tall.

18
  • Alto- means that they form at a medium altitude.
  • Look like cumulus clouds.

19
  • Thunderstorm Clouds sometimes called
    thunderheads.
  • Tallest clouds, they grow from cumulus clouds.
    Produce heavy rain.
  • The suffix nimbus means rain.

20
  • Round, downward-extending protrusions.
  • Bag like sacs.
  • Usually occurs along with some cumulonimbus
    clouds.
  • May indicate very severe weather.

21
  • Strato- means spread out
  • Flat layered clouds.
  • Usually cover most of the sky.

22
  • Prefix nimbus means rain.
  • Flat layered clouds.
  • Accompany warm fronts.
  • Bring rain, snow, sleet or freezing rain.

23
  • Look like stratus clouds high in the atmosphere.

24
  • Feathery hooked ends
  • Made up of ice crystals
  • First to arrive with a warm front.

25
  • Look like cumulus clouds.
  • High in the atmosphere.
  • Made of ice crystals.

26
  • A cloud that occurs at or near the ground.
  • Forms when the ground cools after a warm humid
    day.
  • The air above the ground cools to the dew point.
  • The sun burns off the fog. (evaporates)

27
  • Explain how clouds are classified?
  • Use the Sky Watcher Chart to help you.

28
  • Directions
  • Read each question.
  • Click on the letter of your choice.
  • If you get a question wrong, the button will turn
    red. Try again.
  • If you get the question right, move on to the
    next question by clicking the arrow.
  • Click the arrow to the right to begin.

29
1. These clouds cover the sky and bring rain,
snow or sleet.
A
Stratus
B
Cirrus
C
Cumulus
D
Nimbostratus
30
2. What type of cloud is feathery or wispy?
A
Cirrus
B
Stratus
C
Cumulus
D
Nimbus
31
3. What type of cloud means heap or pile?
A
Stratus
B
Cirrus
C
Cumulus
D
Mammatus
32
4. Identify this cloud that occurs on the ground.
A
Cirrus
B
Cumulus
C
Stratus
D
Fog
33
5. Identify this Cloud
A
Cirrus
B
Mammatus
C
Cumulus
D
Cumulonimbus
34
  • Congratulations on being able to correctly
    identify the types of clouds! You are on your
    way to becoming a meteorologist. Keep up the
    great work!
  • Read pages 167-173
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