PHSC 1180_ Exam 3 Extra Credit
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Clemson University *
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1180
Subject
Astronomy
Date
Dec 6, 2023
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3
Uploaded by KidBoulder11839
Exam 3 Extra Credit
Green House Effect Stimulation
Hypothesize why the inside of a car feels so much warmer than its surroundings on sunny days.
Part I: A Greenhouse Simulation
Select the “Glass Layers” tab.
1)
What do the yellow stars represent?
Sunlight photons
2)
What do the red stars represent?
Infrared photons
3)
Record the approximate temperature “inside the greenhouse” before
adding glass panes.
-9.3 C
Add one glass pane.
4)
What do the sunlight photons do when they hit the glass from the top?
When sunlight photons hit the glass from the top, they continue to pass
through the glass.
5)
What do the infrared photons do when they hit the glass from the
bottom? Be specific.
When infrared photons hit the glass from the bottom, they turn around
and continue to bounce back and forth from the surface to the glass,
remaining trapped and stagnant.
6)
What is the new temperature “inside the greenhouse?”
40.6 C
7)
Based on the observations of the photons, why does the temperature go
up so much?
The temperature goes up because the infrared photons remain in the
greenhouse, therefore their heat is trapped in the greenhouse.
8)
What happens to the temperature as additional glass panes are added?
The temperature continues to increase inside the greenhouse as
additional planes are added. More heat is being trapped with the addition of
more glass planes.
9)
Explain why this happens by observing the photons.
This happens because more infrared photons are being trapped and at
higher levels. This increases the temperature because the heat remains
trapped.
10)
Before proceeding to the earth, predict how what you have discovered
regarding greenhouses might apply to the earth and its atmosphere.
Certain products, such as spray deodorant and hairspray, release a
chemical. This chemical produces a layer around earth, called the Ozone
Layer. This layer traps in the infrared photons. As this layer increases, the
temperature of Earth increases, because the photons are being trapped.
Part II: The Earth Simulation
Select the “Greenhouse E±ect” tab.
11)
Which greenhouse gases are considered by the simulation?
CO2, CH4, N2o
12)
Which time period do the default conditions represent?
1750
The thermometer represents the average global temperature.
13)
What is the average global temperature for the “today” simulation?
14.9 C
14)
Is the behavior of the photons more similar to the greenhouse
simulation with or without glass panes?
The behavior of the photons in the Earth stimulation is more similar to
the greenhouse with glass planes.
Reduce the greenhouse gas concentration to “None”.
15)
Is the behavior of the photons more similar to the greenhouse
simulation with or without glass panes?
The behavior of the photons in the Earth stimulation is more similar to
the greenhouse without glass planes.
16)
What is the average global temperature?
-17.9 C
17)
Considering the behavior of the photons, why does the temperature drop
so much?
The temperature drops so much, because the sunlight and infrared
photons do not remain enclosed in one area. There is nothing trapping them,
therefore they move freely back into the atmosphere. This means less heat is
trapped, so the temperature will drop.
Increase the greenhouse gas concentration to “Lots.”
18)
What is the average global temperature?
25.8 C
19)
Considering the behavior of the photons, why does the temperature
increase?
The temperature increases because the infrared photons remain
enclosed in one area. The gas layer is trapping, therefore they do not move
freely back into the atmosphere. This means more heat is trapped, so the
temperature will increase.
20)
Experiment with other periods in earth’s history or add clouds and
record interesting observations.
Ice Age: surface temperature is at the lowest (7.4 C), infrared photons
roam freely
1750: surface temperature increases from Ice Age (13.6), infrared
photons roam freely, slightly less than Ice Age
1950: surface temperature increases from 1950 (13.8), infrared photons
roam freely, slightly less than 1750
2020: surface temeprate increases from 2020, infrared photons roam
more freely, less than 1950.
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