Module One Lesson Five
Getting Started
In the first few lessons of this module we were introduced to Earth’s Systems, the layers and structure of our planet and how geoscientists locate and extract oil and other minerals beneath the Earth’s crust. Why is it important for us to know where the oil and minerals are and how to get them out.
In this lesson we are going to take a look at the Tar Sands in Alberta and the process known as fracking. You may have never given much thought to the Tar Sands in Alberta other than you know somebody who has gone to work there. What in the world is fracking? Let’s find out…
The Work for Today
In today’s lesson, we are going to examine and understand what is actually happening up in the Tar Sands of Alberta and what the process of fracking is.
By the end of today’s lesson you will be able to say:
- I can identify and discuss the process of crude oil extraction from bitumen
- I can understand what the process of fracking is.
- I will understand some of the environmental, economic and social implications of these two processes.
This lesson should take approximately 1.5 hours.
Work On It
Part 1:
Bitumen extraction
To extract oil out of bitumen or tar sands there are several steps involved in the process. Large amounts of fresh water are used in the processing and this creates poisonous tailings that could potentially damage and destroy the delicate balance of the ecosystem in Canada’s Northern boreal forests.
Please view the following video clip to find out more.
While you are watching, think about the land up in Northern Alberta. What kind of effects does this extraction have on the ecosystems there? How does it affect the communities economically and socially? What are the long term environmental effects? Are the economic benefits really that great?
View H2Oil clip now Insert link: http://www.youtube.com/watch?v=eo302D9SqRo
Fracking
Hydraulic Fracturing (fracking) is the fracturing of a natural gas rock bed with pressurized liquid. Small cracks are made within the rock bed and sand is used to keep the spaces open. Fracking fluid that contains large volumes of water, sand and chemicals is pumped down into these spaces. Over 700 different chemicals can be used by industry to compress the water, kill off bacteria and dissolve minerals. This fluid is then extracted and the natural gas within the rock is recovered. Once the site has been exhausted it is sealed up and the left over fracking fluid is deposited deep within the ground. Because the fracking fluid is highly toxic, the main risk to humans is contamination of drinking water. A large amount of energy is also required to extract the natural gas, creating negative effects on the climate balance.
The process of fracking is not new and has been around since the 1940s. Why is industry so interested in it now?
View Fracking explained now. Insert link: http://www.youtube.com/watch?v=Uti2niW2BRA
Answer the multiple choice questions below to check your understanding. Choose the best answer.
- It is estimated that there are ________________ of crude bitumen in Alberta’s Tar Sands.
a) 150 thousand barrels
b) 100 billion barrels
c) 175 billion barrels
d) 160 million barrels
- To separate sand from the bitumen it is mixed with large amounts of _____________ heated by natural gas.
a) Gravel
b) Rock
c) Oil
d) Fresh Water
- How many barrels of fresh water are required to produce one barrel of oil and where does the water come from?
a) 5 barrels, Thompson River and Glacier
b) 4 barrels, Athabasca River and Glacier
c) 10 barrels, Fraser River
d) 6 barrels, Skeena River.
- The extraction of oil from the tar sands
a) Contributes to a cycle of consumption that accelerates climate change.
b) Causes waste water that creates tailings ponds.
c) Is developing a break neck speed and is driven by industry.
d) All of the above.
- The Security and Prosperity Partnership ensures
a) Energy and water for Canada.
b) Energy and water for the US.
c) Energy and water for China.
d) Energy and water for Europe.
- Since the Industrial Revolution our energy consumption has ____________ and is supplied by ________________.
a) Decreased, wind power
b) Decreased, oil
c) Increased, solar energy
d) Increased, fossil fuels
- Hydraulic fracturing describes the removal of natural gas from deep layers in Earth by using _______, __________, and ___________.
a) Water, sand, chemicals.
b) Oil, hot water, salt
c) Water, loam, peat
d) Compost, hydrochloric acid, water
- There is currently a fracking boom in the US because
a) It is an easy and efficient way to extract natural gas from porous rock.
b) Conventional methods of retrieving natural gas have been exhausted.
c) People like to heat their homes with natural gas.
d) Oil has run out.
- Fracking is when fracking fluid is pumped into the gas bearing rock creating loads of fractures that are held open by grains of sand. Next, ______________ are pumped through the fractured rock and they ____________, _________________, and ____________.
a) Chemicals, dissolve minerals, kill off bacteria, compress the water.
b) Salt grains, dissolve sand, heat water, kill of wildlife.
c) Tailings, combine minerals, suppress the bacteria, produce calcium carbonate.
d) Sand grains, produce sodium chloride, fight evil, solidify.
- Fracking is associated with several risks, the primary one being:
a) The destruction of ecosystems.
b) The contamination of drinking water.
c) The drying out of aquifers.
d) The negative effects on the climate balance.
Answers: Please hide and let student choose before providing.
1) c
2) d
3) b
4) d
5) b
6) d
7) a
8) b
9) a
10) b
Part 2: What do you think?
In this portion of the lesson you will view part of Witness’ documentary “To the Last Drop.” While you are viewing the clip, think about the long term implications of this industry. Also think of the economic impact on Canada. If the tar sands create jobs and industry, is it such a bad thing?
View To the last drop. Insert link: http://www.youtube.com/watch?v=Uti2niW2BRA
Show It
Your assignment for today is to summarize what is happening up in the tar sands and post it on the discussion board. What are the environmental and economic implications? Do you think the Tar Sands are a good thing or a bad thing for Canada? Your post should be at least 250 words long. Be sure to comment or reply feedback to at least two other students’ opinions.
Sources used:
“Hydraulic fracturing.” Wikipedia. Wikimedia Foundation, 18 Dec. 2013. Web. 19 Dec. 2013. <http://en.wikipedia.org/wiki/Hydraulic_fracturing>.
Hess, Frances Scelsi. Earth science: geology, the environment, and the universe. New York, N.Y.: Glencoe/McGraw-Hill, 2002. Print.