Glacial+Simulation+Lab+Worksheet
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Liberty University *
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132
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Geography
Date
Feb 20, 2024
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9
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Name ___________________________________ Glacial Simulation Lab Worksheet 1.
You will see the glacial simulation lab in this window. https://phet.colorado.edu/sims/cheerpj/glaciers/latest/glaciers.html?simulation=gl
aciers 2.
Play with the sim for 5 minutes. Discuss 5 observations in complete sentences. (10 pts)
3.
You can move tools around. You can place the tool back in the toolbox by placing it directly over the image. If you hover your mouse over the individual items in the toolbox, you will see the names of each item. 4.
In science, we use the metric system. Please change your view to the metric system, and click equilibrium line.
5.
Complete this chart to identify the tools in this simulation. (1 pt each=9 pts) Picture of Tool Name of Tool What is the tool used for? Thermometer Just for a Point of Reference Extraction of water or other liquids, geotechnical investigation, mineral exploration, etc.
6.
Click “Reset all”.
Each time you click “Reset all” you must change your view back metric system and click equilibrium line. 7.
Allow the simulation to run for 20 years
while keeping the climate with a sea-
level air temperature of 19.0
°
C and 0.9 m.
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8.
Using the glacial budget meter, record the accumulation, ablation, and glacial budget at the equilibrium line. (3 pts) Accumuation Ablation Glacial Budget 9.
What is the temperature at the same spot? (at the equilibrium line) (1 pt) 10.
What is the glacial thickness at the equilibrium line? (1 pt) 11.
What is the distance and elevation at the equilibrium line? (1 pt) 12.
Change just the sea-level air temperature to 13.0
°
C. Use the bear at the top of your screen to locate the equilibrium line. Then, measure the distance and elevation at the equilibrium line. (2 pt)
13.
Changing the sea-level air temperature over a 20-year time period: You will use the same skills to fill in the chart below.
What are the different characteristics of the glacier at the equilibrium line with different sea-level air temperature changes and a constant average snowfall of 0.9 m over a 20-year time period? Each time you press “reset all”: a.
Click “metric” b.
“Equilibrium line” c.
“Set glacier to steady state” d.
Pay attention to where you are placing your tool on the “equilibrium line” If the measurement cannot be calculated at the equilibrium line, indicate that with “N/A”
(13 Continued) Changing the sea-level air temperature over a 20-year time period: (1 pt each=21 pts total) Sea-Level Air Temperature
13.0
°
C 18.0
°
C
19.0
°
C
Distance (m) Elevation (m) Temperature (
°C) Accumulation (m/year) Ablation (m/year) Glacial Budget (m/year) Glacial Thickness Picture 14.
As the sea-level air temperature increases, what happens to the size of the glacier? Use complete sentences. (3 pts)
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15.
Changing the average snowfall over a 20-year time period What are the different characteristics of the glacier at the equilibrium line with different average snowfalls and a constant sea-level air temperature over a 20-
year time period? Each time you press “reset all”: a.
Click “metric” b.
“Equilibrium line” c.
“Set glacier to steady state” d.
Pay attention to where you are placing your tool on the “equilibrium line” If the measurement cannot be calculated at the equilibrium line, indicate that with “N/A”
(15 continued) Changing the average snowfall over a 20-year time period
(1 pt each=21 pts) Average Snowfall
0.8 m 1.0 m 1.5 m Distance (m) Elevation (m) Temperature (
°C) Accumulation (m/year) Ablation (m/year) Glacial Budget (m/year) Glacial Thickness Picture 16.
As the average snowfall increases, what happens to the size of the glacier? Use complete sentences. (3 pts) 17.
Describe how sea-level air temperature and average snowfall affects the size of a glacier. Use complete sentences. (5 pts)
18.
“Reset all.” Set the sea-level air temperature to 19.0
°C and average snowfall to 0.9 m. Set your years to a “fast” speed, and press play. What happens to the glacier? Explain what happens to the glacier in terms of: sea-level air temperature, average snowfall, glacial budget. Use complete sentences. (10 pts) 19.
Click on the tab “advanced.” “Reset all.” Set the sea-level air temperature to 19.0
°C and average snowfall to 0.9 m. Set your years to “fast” speed, and press play. Click on each graph, and determine the x and y-axis labels, and the units. Then describe each graph. The first one is completed for you as an example. (10 pts) X-axis label X-axis units Y-axis label Y-axis units Glacier Length vs. Time Time Years Glacier Length Meters Equilibrium Line Altitude vs. Time Air Temperature vs. Elevation
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