Question 1

Which of the following is a waste that can be used to produce biofuel?

Accepted Answer

A) used fryer oil from restaurants 
B) manure 
C) crop residues 
D) animal fats 
E) All of these answers are correct. 
A) used fryer oil from restaurants 
B) manure 
C) crop residues 
D) animal fats 
E) All of these answers are correct. E

Question 2

One way to improve energy return and reduce the amount of greenhouse gases typically released by traditional monoculture fuel crops is to use LIHD grassland plants.What does LIHD stand for?

Accepted Answer

A) low-input,high-density 
B) low-input,high-diversity 
C) lean-inflow,high-density 
D) lean-inflow,high-diversity 
E) late-ingrass,high-dependence 
A) low-input,high-density 
B) low-input,high-diversity 
C) lean-inflow,high-density 
D) lean-inflow,high-diversity 
E) late-ingrass,high-dependence B

Question 3

Refer to Infographic 5.Describe the production of grain ethanol and cellulosic ethanol.Why is it more challenging to produce ethanol from plants with high cellulose content compared with producing it from grain?

Accepted Answer

Ethanol can be produced from the biological fermentation of any plant material.Food sources like grains and sugarcane with soft starch are easily broken down by yeast (fermentation),whereas plant material high in cellulose is more challenging to break down and requires stronger chemical reactions.The process begins with the harvesting of the plant material that then undergoes preparation.The preparation involves chopping and grinding the raw material into small,uniform-sized pieces.The small pieces then undergo steaming.The steaming causes the raw material to swell,increasing the surface area.The swollen pieces are then treated with enzymes.The enzymes chemically break down the cellulose into sugar subunits.Lignin is removed,and the remaining mixture is treated with yeast.The yeast digests the sugars and procures ethanol that is then concentrated.

Question 4

Which of the following is/are predicted to generate the most oil per acre in biodiesel production?

Accepted Answer

A) algae 
B) switchgrass 
C) soybeans 
D) rapeseed 
E) oil palms 
A) algae 
B) switchgrass 
C) soybeans 
D) rapeseed 
E) oil palms

Question 5

In 2012,biofuels provided about _______ of the energy used in the United States,more than any other type of renewable resource.

Accepted Answer

A) 0.4% 
B) 7% 
C) 14% 
D) 40% 
E) 80% 
A) 0.4% 
B) 7% 
C) 14% 
D) 40% 
E) 80%

Question 6

Which of the following is a concern regarding early corn ethanol projects?

Accepted Answer

A) Corn production requires energy inputs like fertilizers and pesticides. 
B) Considerable water is required to produce ethanol from corn. 
C) The projects used as much (or almost as much)energy as they produced. 
D) All of these answers are concerns. 
E) None of these answers are concerns. 
A) Corn production requires energy inputs like fertilizers and pesticides. 
B) Considerable water is required to produce ethanol from corn. 
C) The projects used as much (or almost as much)energy as they produced. 
D) All of these answers are concerns. 
E) None of these answers are concerns.

Question 7

Science Literacy Use the graph below in answer the next  questions.  
-The net energy balance of biomass biodiesel is _______.

Accepted Answer

A) 1 
B) 7 
C) 13 
D) 15 
A) 1 
B) 7 
C) 13 
D) 15

Question 8

Which of the following is FALSE regarding biodiesel?

Accepted Answer

A) It is the only biofuel to be certified by the EPA. 
B) It comprises only a small portion of the biofuels produced today. 
C) It can be produced from soybeans as well as from animal fats. 
D) It can be used in both diesel and gasoline engines. 
A) It is the only biofuel to be certified by the EPA. 
B) It comprises only a small portion of the biofuels produced today. 
C) It can be produced from soybeans as well as from animal fats. 
D) It can be used in both diesel and gasoline engines.

Question 9

Which of the following choices would NOT be considered a biofuel feedstock?

Accepted Answer

A) beef from cows 
B) animal waste 
C) crops 
D) wood products 
A) beef from cows 
B) animal waste 
C) crops 
D) wood products

Question 10

Which of the following is a challenge faced when making biofuel from algae?

Accepted Answer

A) meeting fresh water requirements 
B) competing with food crops 
C) paying the high expenses of oil production facilities 
D) convincing companies to invest in turning algae oil into fuel 
A) meeting fresh water requirements 
B) competing with food crops 
C) paying the high expenses of oil production facilities 
D) convincing companies to invest in turning algae oil into fuel

Question 11

You are concerned about the environment. You want to do your part to make the world more sustainable. Your environmental science professor mentions biofuels as an alternative to fossil fuels and that they have a lower carbon footprint than fossil fuels. You decide to do more research on biofuels.
-In your research on biofuels,you discover biofuels can be made from cellulosic crops.This means _______.

Accepted Answer

A) high-sugar crops like corn are used to make the fuel 
B) fields planted in a monoculture yield more production for a fuel source 
C) using plants such as grasses,which are more difficult to break down,for the fuel 
D) the plants used for fuel are not useful as crops 
A) high-sugar crops like corn are used to make the fuel 
B) fields planted in a monoculture yield more production for a fuel source 
C) using plants such as grasses,which are more difficult to break down,for the fuel 
D) the plants used for fuel are not useful as crops

Question 12

You are concerned about the environment. You want to do your part to make the world more sustainable. Your environmental science professor mentions biofuels as an alternative to fossil fuels and that they have a lower carbon footprint than fossil fuels. You decide to do more research on biofuels.
-To your surprise,you discover algae can be used to make biofuel.You tell your friend a major advantage of this is _______.

Accepted Answer

A) it can easily be harvested on a large scale 
B) algae is small,so it won't take up much space 
C) cultivation won't compete with food crops 
D) it can be made cheaply 
A) it can easily be harvested on a large scale 
B) algae is small,so it won't take up much space 
C) cultivation won't compete with food crops 
D) it can be made cheaply

Question 13

List and describe at least three advantages and three disadvantages of biofuels.

Accepted Answer

Refer to Infographic

Question 14

Ethanol can be produced from the biological fermentation of all of the following sources EXCEPT _________.

Accepted Answer

A) corn. 
B) algae. 
C) sugarcane. 
D) switchgrass. 
E) None of these answers-ethanol can be produced from the biological fermentation of any plant material. 
A) corn. 
B) algae. 
C) sugarcane. 
D) switchgrass. 
E) None of these answers-ethanol can be produced from the biological fermentation of any plant material.

Question 15

Driving habits that maximize mileage include all of the following EXCEPT _________.

Accepted Answer

A) keeping your vehicle in tune by scheduling regular maintenance appointments 
B) avoiding idling and turning off your car if you will be parked,even briefly 
C) maintaining 70 miles per hour on the highway to decrease the time the engine is running 
D) avoiding carrying excess weight in the vehicle 
E) None of these answers is correct. 
A) keeping your vehicle in tune by scheduling regular maintenance appointments 
B) avoiding idling and turning off your car if you will be parked,even briefly 
C) maintaining 70 miles per hour on the highway to decrease the time the engine is running 
D) avoiding carrying excess weight in the vehicle 
E) None of these answers is correct.

Question 16

Which of the following is an advantage of using biofuel?

Accepted Answer

A) All types have a higher energy content than fossil fuels,so less needs to be burned to produce the same amount of energy. 
B) Burning biomass directly produces minimal particulate matter pollution. 
C) If grown with minimal or no fossil fuel inputs,it is carbon neutral or negative. 
D) The most commonly grown biofuel crops consume far less water per kilowatt-hour than what is used for traditional fossil fuels. 
A) All types have a higher energy content than fossil fuels,so less needs to be burned to produce the same amount of energy. 
B) Burning biomass directly produces minimal particulate matter pollution. 
C) If grown with minimal or no fossil fuel inputs,it is carbon neutral or negative. 
D) The most commonly grown biofuel crops consume far less water per kilowatt-hour than what is used for traditional fossil fuels.

Question 17

Refer to the following graphic and use the data to help describe how emissions from biofuels compare with those from gasoline.Also address how emissions from current biofuels compare to those from LIHD biofuels.

Accepted Answer

All biofuels release fewer greenhouse ga

Question 18

What are some of the concerns regarding the use of crops in biofuel production?

Accepted Answer

Some of the crops,specifically corn,are

Question 19

Bioethanol that is produced by breaking down cellulose in plants is called _________.

Accepted Answer

A) cellulosic ethanol 
B) starch ethanol 
C) plant ethanol 
D) cellulose sequestering 
E) cellulosic sequestering 
A) cellulosic ethanol 
B) starch ethanol 
C) plant ethanol 
D) cellulose sequestering 
E) cellulosic sequestering

Question 20

Which of the following choices is typically used to produce biodiesel?

Accepted Answer

A) corn 
B) sugarcane 
C) soybeans 
D) switchgrass 
E) beets 
A) corn 
B) sugarcane 
C) soybeans 
D) switchgrass 
E) beets

Exam 32: Biofuels Gas From Grass

Which of the following is a waste that can be used to produce biofuel?

One way to improve energy return and reduce the amount of greenhouse gases typically released by traditional monoculture fuel crops is to use LIHD grassland plants.What does LIHD stand for?

Refer to Infographic 5.Describe the production of grain ethanol and cellulosic ethanol.Why is it more challenging to produce ethanol from plants with high cellulose content compared with producing it from grain?

Which of the following is/are predicted to generate the most oil per acre in biodiesel production?

In 2012,biofuels provided about _______ of the energy used in the United States,more than any other type of renewable resource.

Which of the following is a concern regarding early corn ethanol projects?

Science Literacy Use the graph below in answer the next questions. -The net energy balance of biomass biodiesel is _______.

Which of the following is FALSE regarding biodiesel?

Which of the following choices would NOT be considered a biofuel feedstock?

Which of the following is a challenge faced when making biofuel from algae?

List and describe at least three advantages and three disadvantages of biofuels.

Ethanol can be produced from the biological fermentation of all of the following sources EXCEPT _________.

Driving habits that maximize mileage include all of the following EXCEPT _________.

Which of the following is an advantage of using biofuel?

Refer to the following graphic and use the data to help describe how emissions from biofuels compare with those from gasoline.Also address how emissions from current biofuels compare to those from LIHD biofuels.

What are some of the concerns regarding the use of crops in biofuel production?

Bioethanol that is produced by breaking down cellulose in plants is called _________.

Which of the following choices is typically used to produce biodiesel?

environmental Literacy and Sustainability Lessons From a Vanished Society

Science Literacy and the Process of Science Fungal Attacker Threatens North American Bats

Information Literacy and Toxicology Lead in the Water

Ecosystems and Nutrient Cycling Engineering Earth

Population Ecology Gray Wolves Return to Yellowstone

Community Ecology the Florida Everglades: a Community in Cris

evolution and Extinction a Tropical Murder Mystery

Biodiversity Palm Oil Plantations Threaten Tropical Forests

Preserving Biodiversity a Forest Without Elephants

Human Populations the Kerala Model

Urbanization and Sustainable Communities Creating Green Cities

Environmental Health Eradicating a Parasitic Nightmare

ecological Economics and Consumption Wall to Wall, Cradle to Cradle

environmental Policy the World Tackles Ozone Depletion

managing Solid Waste a Plastic Surf

Freshwater Resources Toilet to Tap

Water Pollution Suffocating the Gulf

marine Ecosystems Ocean Acidification: the Other Co2 Problem

Forests Returning Trees to Haiti

soil Resources and Grasslands Restoring the Range

Mineral Resources No Stone Unturned

Feeding the World a Gene Revolution

sustainable Agriculture: Raising Crops Farming Like an Ecosystem

Agriculture: Raising Livestock Can Meat Be Part of a Healthy, Environmentally Conscious Diet

Fisheries and Aquaculture Fish in a Warehouse

coal Bringing Down the Mountain

Oil and Natural Gas the Bakken Oil Boom

Air Pollution the Youngest Scientists

global Climate Change Climate Refugees

Nuclear Power the Future of Fukushima

Sun, Wind, Water, and Earth Energy Fueled by the Sun

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