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School
SUNY Buffalo State College *
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Course
223
Subject
Geography
Date
Apr 29, 2024
Type
Pages
4
Uploaded by rishasarahsofie on coursehero.com
Smog Lab Report
Instructions: In this lab activity, you will examine the sources and impacts of air pollution. You will run
several trials during the lab. Each trial will examine the impact of a different independent variable. Make
sure to develop a hypothesis before observing each trial. Once the trial is complete, compare your
hypothesis to the actual results. Use this lab report to collect data and analyze your results. Submit your
lab report to your instructor when completed.
Title: Smog Dispersal Lab
Objective(s):
See
slide 1
of the virtual lab for these objectives. List the objectives below.
Variables:
The variables are described in detail in your virtual lab activity on
slide 2
. Be sure to read these
descriptions in the virtual lab before completing this section.
List your controlled variables, independent variable, and dependent variable of
each test
of the lab
activity. Remember, controlled variables are factors that remain the same throughout the experiment.
An independent (test) variable changes so that the experimenter can see the effect on other variables.
The dependent (outcome) variable will change in response to the test variable.
Trial 1
Trial 2
Trial 3
Controlled variables:
Layer height, Humidity,
Lapse Rate
Layer height, wind
Velocity, Lapse Rate
Layer height, Wind
Velocity, and
Humidity
Independent variable:
Wind Velocity
Humidity
Lapse Rate
Dependent variable:
Maximum Vertical
Dispersal Height
Maximum Vertical
Dispersal Height
Maximum Vertical
Dispersal Height
Hypothesis:
Prediction 1: If we increase the wind velocity, the maximum vertical dispersal height and rate of
diffusion will
increase
.
Prediction 2: If we increase the humidity, the maximum vertical dispersal height will
decrease
after 24 hours.
Prediction 3: If we increase the lapse rate, the maximum vertical dispersal height of the
pollutants will
increase
.
Procedure:
Access the virtual lab and complete the procedures described. Provide a brief summary of the
steps you followed during the experimental procedure.
Materials:
Smog Virtual Lab
Summary of Steps:
1.
Depending on independent variables (wind velocity, humidity levels, and
lapse rate) choose the specific value or level of each variable
2.
Look at the top right graph to determine the distance of the dispersal of air
pollution and record data
3.
Look at the bottom right graph that specifically states the time duration and
find the elevation height on the graph where the data becomes constant and
record data
4.
Repeat with the rest of the values or levels for each variable
Data:
Table 1: Wind Velocity and Maximum Vertical Dispersal Height
Distance (m)
Time (min.)
Maximum Height (m)
Trial 1
4000 m
67.5 min
510 m
Trial 2
4000 m
22.8 min
400 m
Table 2: Humidity Level and Maximum Vertical Dispersal Height
Distance (m)
Time (min.)
Maximum Height (m)
Trial 1
4000 m
67.5 min
510 m
Trial 2
4000 m
66.3 min
600 m
Table 3: Lapse Rate and Maximum Vertical Dispersal Height
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