Web Assignment Climate Change & Topographic Maps, lab 3 assignment help


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In Geology 4L Planet Earth Lab
Lab 3: Web Assignment Climate Change & Topographic Maps
Note: this assignment is due by the beginning of the next lab.
In this assignment, you will use information found on the Internet to answer the following questions:

In addition to sea level rise, what are other indicators that Earth’s climate is changing?
What is your impact on planet Earth? Calculate your ecological footprint and consider some
actions you can take to reduce it.
You will find all the links for this assignment at our course web site on Canvas.
Part I. Signs of Climate Change
In Lab 3 you discovered that rising sea levels are one indicator that Earth’s climate is changing. What
are some other types of evidence that climate change is already happening? What might we expect in
the future?
Go to http://www.epa.gov/climatestudents/impacts/signs/index.html. This web site provides a nice
summary of the many lines of evidence for a changing climate. We’ll look at a subset of these signs of
change. Use the information provided to fill in the table below. You don’t need to include every detail.
Pick out the major points.
What is happening now?
What will happen in the
Why does it matter?
What is happening now?
What will happen in the
Why does it matter?
Shrinking Sea
Part II. Calculate your ecological/carbon footprint
As you learned in Lab 3, the extent of future sea level rise will depend on choices we make today about
whether and how to reduce emissions of CO2 and other greenhouse gases. Our individual and collective
choices can help to mitigate (limit) human impact on Earth’s climate and on our planet’s finite natural
resources and ability to absorb waste. Ecological footprint analysis is a tool for measuring human
impact on planet Earth. Understanding the impacts of our daily choices is the first step for figuring out
what actions we can take to lessen those impacts.
1. The answers to the questions below can be found on these two web pages:
a. What does the ecological footprint measure?
b. How does an ecological footprint differ from a carbon footprint?
2. Now go to http://footprintnetwork.org/en/index.php/GFN/page/calculators/ to calculate your
personal ecological footprint.
a. Use your results to fill in the information below.
How many planet Earths? ________
This indicates how many Earths would
be needed to provide enough resources
if everyone lived like you.
How many global acres (hectares) of
Earth’s productive land are needed?
__________ global acres
______ tons of carbon dioxide
Breakdown of your footprint
by category (%)
How big is a hectare?
You can go back and edit your footprint to see how different responses might change your overall
2. Now click on “explore scenarios”.
a. Describe how pledging to take each of the actions below would reduce you ecological footprint.

Reduce the amount of animal products in your diet by half.

Purchase products that use less packaging or those made of 100% post-consumer recycled
content material.

Take a local vacation to avoid air travel.
b. Which of these changes would be most difficult for you to make and why?
Which would be the easiest to make and why?
Part III. Topography Pre-Lab
First go to https://www.usgs.gov
What does “USGS” stand for?

Scroll down to Maps and click the “Explore” button.
Click on “Topographic Maps” section and then click on the link “Download Topographic Maps from the
National Map”
In the Search box in the right pane of the window, above the map, type in “Yosemite Valley, CA” then
click “Go.”


A map will be produced with a blue place
marker indicating where the Yosemite
Valley is located.
In the window accompanying the place
marker, choose “Find Products.”
In the left windowpane, under Historical
Topographic Maps, click the “Results”
Download the “USGS 1:24000-scale
Quadrangle for Half Dome CA 1997” map.
Clicking the Download button will open
the map in a new window or download it to
your computer.
Open this file if it didn’t already open in
your web browser. You should see a map
with lots of brown squiggly lines.

This is what is called a “topographic map.” If you like to hike or backpack often, these maps are often used to
navigate your way down trails and through wilderness areas.
Use the topographic map you just opened to answer the questions that follow:
1. What is the name of the Quadrangle? (Look to the top right corner of the map.)
2. What is the scale of the map?
(Hint: Look below the map in the

This “scale” denotes the size of the
area the map portrays. If you have a
scale of 1:24,000, then for every inch
on the map = 24,000 inches in real
life (or 2000 ft.) or .378 mile
3. Our map has a scale of 1: 24,000. If I measure 10 inches on the map, how far is that if I measured it in
real life? (Hint: 1 inch on the map = 24,000 inches in real life) - 12 inches = 1 foot and 5,280 feet = 1
(Hint: it would be several miles). Make sure to show your calculations
Watch this video before continuing: https://youtu.be/62Hme0-F80U
4. What are all the crazy brown lines on the map?
What do they denote?
(Hint: if you ever been to Yosemite Valley, shear cliffs border the valley. If you haven’t been there, look up a
picture of Yosemite Valley online. I couldn’t simply walk up these shear cliffs, now could I? If brown lines
are stacked very close to each other, what does that mean?
5. What is the contour interval of the map?
6. What is the latitude and longitude of the top right corner on the map? (Write in Degrees, minutes,
7. What is the definition of elevation?
8. What is the definition of a contour line?
9. What is the elevation at the top of Half Dome? (Hint: look for the “X” with a number next to it)
10. What is the name of the river running through the middle of Yosemite Village?
11. Have you ever been to Yosemite National Park?
If you have, share your trip experience.
What did you do?
Where did you go in the Park?

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