BBE 1002 UMN FINAL EXAM
QUESTIONS AND ANSWERS GRADED A+
2025/2026
What was the R/P ratio for crude oil in 2010? - ANS About 54 years
When people talk about "ore" what are they referring to? If you don't know, you may need to
google it. - ANS A naturally occurring solid material from which a metal or valuable mineral
can be profitably extracted.
The "Not in my backyard" argument prioritizes ___________ environmental issues over
_____________ environmental issues - ANS global, local
How much in gold and silver each year are discarded from the US just in phones alone? -
ANS $60 million
True or False? Water vapor is considered a greenhouse gas. - ANS True
The cool graphic on carbon dioxide concentrations over time (since like 800,000 BCE) showed
some interesting things. What was the approximate concentration of CO2 in the atmosphere in
1979? - ANS 330 ppm
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Plants take carbon dioxide out of the atmosphere because of photosynthesis. Living plants also
put carbon dioxide back in the atmosphere through a process called _____________. -
ANS respiration
If you were (somehow), in a car going 60 miles per hour, driving straight up towards the sky,
how long would it take for you to reach the edge of the stratosphere?
Use this conversion:
(earth surface to stratosphere) x (1 hour/60 miles) x (60 minutes/1hour) = - ANS about 30
minutes
Carbon dioxide represents about what % of the atmosphere? - ANS 0.04%
The global temperatures in the last ice age were about _______degrees Celsius cooler than the
current global temperature of 15C. - ANS 4
How do greenhouse gases work in regulating the energy balance of Earth's atmosphere? -
ANS They absorb infrared energy reflected from the earth.
Energy is measured in Watts/m2. Yep, the same 'watts' used when you are shopping for a light
bulb. On average, how much solar energy reaches a square meter of Earth? - ANS 340
watts/m2
According to the lecture an LCA provides _____________ - ANS information to assess the
environmental impact of a product or service
True or False:
Setting of the "system or study boundaries" is part of the "impact assessment" step of the LCA. -
ANS false
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS GRADED A+
2025/2026
What was the R/P ratio for crude oil in 2010? - ANS About 54 years
When people talk about "ore" what are they referring to? If you don't know, you may need to
google it. - ANS A naturally occurring solid material from which a metal or valuable mineral
can be profitably extracted.
The "Not in my backyard" argument prioritizes ___________ environmental issues over
_____________ environmental issues - ANS global, local
How much in gold and silver each year are discarded from the US just in phones alone? -
ANS $60 million
True or False? Water vapor is considered a greenhouse gas. - ANS True
The cool graphic on carbon dioxide concentrations over time (since like 800,000 BCE) showed
some interesting things. What was the approximate concentration of CO2 in the atmosphere in
1979? - ANS 330 ppm
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Plants take carbon dioxide out of the atmosphere because of photosynthesis. Living plants also
put carbon dioxide back in the atmosphere through a process called _____________. -
ANS respiration
If you were (somehow), in a car going 60 miles per hour, driving straight up towards the sky,
how long would it take for you to reach the edge of the stratosphere?
Use this conversion:
(earth surface to stratosphere) x (1 hour/60 miles) x (60 minutes/1hour) = - ANS about 30
minutes
Carbon dioxide represents about what % of the atmosphere? - ANS 0.04%
The global temperatures in the last ice age were about _______degrees Celsius cooler than the
current global temperature of 15C. - ANS 4
How do greenhouse gases work in regulating the energy balance of Earth's atmosphere? -
ANS They absorb infrared energy reflected from the earth.
Energy is measured in Watts/m2. Yep, the same 'watts' used when you are shopping for a light
bulb. On average, how much solar energy reaches a square meter of Earth? - ANS 340
watts/m2
According to the lecture an LCA provides _____________ - ANS information to assess the
environmental impact of a product or service
True or False:
Setting of the "system or study boundaries" is part of the "impact assessment" step of the LCA. -
ANS false
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
