WW2010 University of Illinois



Name ____________________________

ECO-SCIENCE: WW2010 University of Illinois – Packet 2

To start each module always log on to:

ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/home.rxml

After logging on to the site above, click on the “Forces and Winds” module. You will have 1 day of lab time to answer questions 66-90. MAKE GOOD USE OF YOUR TIME! The answers are in order. Click on either one of these arrows at the bottom of the page

to go to the next page. Once you have completed questions 66-90 you can work on the extra credit module “Light and Optics”.

III. Forces and Winds

66. What is pressure? ______________________________________

________________________________________________________

________________________________________________________

A. Pressure

67. Draw a diagram off to the right,

of a column of air.

68. What happens to the column of air when pressure increases?

________________________________________________________

________________________________________________________

69. What happens to the column of air when pressure decreases?

________________________________________________________

________________________________________________________

70. Atmospheric pressure is measured with what instrument? ______

71. The average air pressure at sea level is 14.7 pounds per square inch (lbs/in2). On television, pressure is given in _________ (_____).

Average air pressure at sea level in this unit of measurement is ______

72. The unit of measure found on weather maps and used by meteorologists is ______________________(____).

Average air pressure at sea level in this unit of measurement is ______

73. Which unit of measurement is in English units and which is in Metric units?

________________________________________________________

74. The number of air molecules _____________ with height and so _______ also decreases with height.

75. Under what altitude does half of the molecules in the atmosphere exist? _________. What would that level be in millibars? _________

76. Why does the air pressure drop so quickly close to the earth and then at a slower rate further from the earth?

________________________________________________________

________________________________________________________

77. Lines on a weather map that connect points of equal pressure are called _______________.

78. A new Isobar is drawn every _____ millibars (mbs).

The 1032 isobar has been drawn for you. Draw the 1028, 1024, 1020, 1016, 1012, and 1008 mb isobars for the following pressure reports.

[pic]

79. What is an isobaric surface? _____________________________

________________________________________________________

Draw a simple diagram to show different isobaric surfaces in the atmosphere.[pic] 80. Using the table above approximately how high above the ground is the 500 mb pressure surface? ___________ ft or __________ m

81. The 5 atmospheric variables or conditions that are usually kept tracked of are _______________, _________________, __________________, _______________, and __________________.

82. Which is more dense and compacted together, warm air or cold air?____

83. Explain how a given pressure surface can have a different height at different locations. (use a diagram and word explanation)

________________________________________________________

________________________________________________________

________________________________________________________

________________________________________________________

84. Word Association with a HIGH pressure center.

Letter = _______ Color = ___________

Another name = _______________________

Winds flow = ____________________ into or out of a HIGH pressure center. (scribble out the wrong answer above)

Movement of air = sinking or rising

(scribble out the wrong answer above)

Kind of weather associated with a HIGH pressure center = ________ 85. Word Association with a LOW pressure center.

Letter = _______ Color = ___________

Another name = _______________________

Winds flow = ____________________ into or out of a LOW pressure center. (scribble out the wrong answer above)

Movement of air = sinking or rising

(scribble out the wrong answer above)

Kind of weather associated with a LOW pressure center = _________

B. Pressure Gradient

86. What is “pressure gradient”? _____________________________

________________________________________________________

________________________________________________________

87. A pressure gradient force causes the air to move from a ________

pressure center to a ____________ pressure center.

C. Coriolis Force

88. The winds deflect or curve to the right in the Northern Hemisphere due to the __________________ _________________.

89. This force increases as the winds become _______________ and as you get closer to the earth’s _____________.

Geostrophic Winds

90. Winds that flow parallel to the isobars because of the balance between the pressure gradient force and the coriolis force are called _______________ winds.

Draw a simple diagram of this type of wind.

-----------------------

1032

1032

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download