Origin of the Atmosphere
Weather Tools
Dew Point and Relative Humidity
Pressure and Winds
Fronts
Orographic Lifting and El Nino/La Nina
100
When water droplets in the air become too heavy they fall as a result of gravity in the form of _________.
What is precipitation?
100
Wind speed is measured with a/an __________ as the wind causes the cups to spin.
What is anemometer?
100
What is the temperature at which dew forms called?
dewpoint
100
at high pressure centers, where does the wind move AND how does it rotate?
away from the center and clockwise
100
I represent this on a weather map.
What is a cold front?
100
How frequent do we have either an El Nino or a La Nina phase?
every 3-7 years
200
Water in the form of a gas is located in the layer of air that is closest to earth. The name for water in the form of gas is ____________.
What is water vapor?
200
Wind direction is determined with a(n) __________.
What is a weather vane?
200
What is a word to describe the amount of moisture in the air compared to the amount of moisture air can hold
Relative humidity
200
When isobars are close together, what does that say about wind speeds?
wind speeds are going to be high
200
The weather is warm, dry, and only a few clouds in the sky. What type of air mass results in this weather forecast?
What is continental?
200
Daily Double!
Determine how many points your group would like to wager and the question will be shown. You will have 60 seconds to answer the question.
Explain why dew occurs along the outside of a glass of cold water on hot summer day. You must incorporate the concept of condensation in your response.
300
This gas makes up about 21% of the air that surrounds earth.
What is oxygen?
300
Amount of precipitation is measured in a(an)______.
What is a rain gauge?
300
If the Dry Bulb is 21°C and the Wet Bulb is 19°C, what is the dew point?
18 degrees Celsius
300
If pressure is low, what kind of weather might we have?
Lousy weather!
300
Which front results in moderate rainfall that lasts for a few hours.
Warm fronts
300
As a parcel of air is pushed up the windward side of a mountain, what happens to the temperature?
decreases
400
The gas which makes up about 3/4 of the air that surrounds earth.
What is Nitrogen?
400
Air temperature is measured using a/an ________.
What is a thermometer?
400
If the wet bulb and the dry bulb are really close, what does that imply about the relative humidity?
RH is very high
400
What is 1 atmospheric pressure in millibars
1013.2mb
400
What direction are these fronts moving?
East - North East
400
Why is the leeward side of a mountain typically a dessert landscape?
Air warms and dries as it descends the leeward side, drying out the land.
500
This is a layer of gases that surrounds the Earth that supports life.
What is the atmosphere?
500
How do you use this sling psychrometer to determine dew point?
1. Read the dry bulb temperature
2. Wet the wet bulb and spin it
3. Read the wet bulb after it cools
4. Use the data on the ESRT to determine the dew point
500
When water vapor reaches dew point temperature, it would like to condense into a cloud and form precipitation. What does the water need in order to condense into a a cloud droplet/ice crystal?
Cloud condensation nuclei (CCN)
500
Why does the wind blow towards the sea in this diagram below?
There is more atmospheric pressure at the land compared to the ocean. Therefore the wind will blow towards the ocean where the pressure is lower.
500
Describe the intensity of rainfall for:
Occluded front
Warm front
Cold front
Occluded: intense rainfall, typically the worst
Warm: moderate rainfall
Cold: intense rainfall, thunderstorms
500
Explain how the easterly trade winds determine whether or not we have an El Nino year or a La Nina year.
A weak easterly trade wind causes less upwelling along the eastern Pacific Ocean (El Nino).
A strong easterly trade wind causes increased upwelling along the eastern Pacific Ocean (La Nina).