By Mr. V. Calzada & Mrs. Swanson
Vocabulary
1. Almost all weather occurs in the lowest layer of air, or atmosphere, that
surrounds Earth. The atmosphere stretches about 1000 km (620 mi)
from the Earth’s surface to outer space.
2. As air warms, its weight, or air pressure, lessens. Air pressure is the
force that the particles of air exert on a surface such as the ground.
3. Humidity is the amount of water vapor in the air.
4. Weather refers to the conditions that exist in the atmosphere over a
short period, ranging from just one day to perhaps a week.
5. In contrast, climate refers to the average weather conditions in an area
over a long period, spanning at least a month and usually longer.
6. A front is a boundary between tow air masses (cold and warm air).
7. Average is an amount over a period of time.
Layer of the
Atmosphere
Sun creates and powers the weather!
Weather is constantly changing because the
atmosphere is constantly changing.
Weather is constantly changing because the
atmosphere is constantly changing.
Measuring Atmospheric Conditions
• Meteorologist observe and measure the following to predict the
constantly changing weather:
• Temperature
• Air pressure
• Humidity
• Precipitation
• Wind speed and direction
Measuring Atmospheric Conditions
Current Brownsville, Texas Weather Forecast
Measuring Atmospheric Conditions:
Homework
Air Pressure
Air Pressure
Weather Map for Brownsville, Texas
• A front is a
boundary between
two air masses.
• A line connecting
small triangles
indicates that a
cold front is
approaching.
• A line that connects
half circles
indicates that a
warm front is
approaching.
Water in the Air
Types of Clouds: Observation of Weather
Data Table And Line Graph
Weather for Russell Elementary for the Week of 11/30 - 12/4
Measurements
Time
Temperature
Rainfall
Wind direction/speed
Air Pressure
Cloud conditions
Day 1
Day 2
Day 3
Day 4
Day 5
Data Table And Line Graph
Weather for Russell Elementary for the Week of 11/30 - 12/4
Measurements
Monday
Tuesday
Wednesday
Thursday
Temperature
61
Friday
Temperature In Degrees Celsius
Temperatures at Russell Elementary
70
60
50
40
30
20
10
0
Monday
Tuesday
Wednesday
Days of the Week
Thursday
Friday