ENVS 1126 Aixin Hou-Exam 1
Questions and Answers
Which of the following are the three vital concepts that move societies toward a
sustainable future?
a. Sound science, sustainability, and stewardship
b. Sustainability, stewardship, and security
c. Stewardship, sound science, and security
d. Sound science, sustainability, and security - Answer- Sound science,
sustainability, and stewardship
Which of the following terms best describes the practice of environmental science?
a. Abstract
b. Integrative and interdisciplinary
c. Highly specialized
d. Theoretical - Answer- Integrative and interdisciplinary
Which one of the following is the broadest scope of ecological study?
a. Population ecology
b. Landscape ecology
c. Community ecology
d. Ecosystem ecology - Answer- Landscape ecology
With few exceptions, inorganic compounds do not have
a. carbon-hydrogen bonds or carbon-carbon bonds.
b. potassium-sodium bonds or hydrogen-chlorine bonds.
c. hydrogen-nitrogen bonds or carbon-oxygen bonds.
d. nitrogen-oxygen bonds or carbon-oxygen bonds. - Answer- carbon-hydrogen
bonds or carbon-carbon bonds.
All scientific investigations are initially founded upon
a. good observations.
b. an already accepted theory.
c. good experiments.
d. multiple hypotheses, some of which are unanswerable. - Answer- good
observations
An average person might consume 2,000 Kilocalories of food in one day. This is
enough energy to heat up how many 1-liter bottles of liquid water from 0 degrees
Celsius to 100 degrees Celsius (just reaching the boiling point of water, but not
turning the water into steam)?
a. 5 1-liter bottles
b. 1 1-liter bottle
c. 20 1-liter bottles
d. 10 1-liter bottles - Answer- 20 1-liter bottles
, As global climate change warms certain mountain ranges, the temperature optima
for the insect species living on the mountain is causing these insects to
a. move farther up the mountain.
b. move to a new biome.
c. move down the mountain.
d. become parasitic. - Answer- move farther up the mountain.
As stated in the ENVS 1126 syllabus (posted on Moodle) and explained in the first
class, there will be ______ graded class discussions via Moodle Forum this
semester. These discussions will help better understand important, timely
environmental issues that will be covered during the semester and encourage
students to share their thoughts with each other. Discussion topics will be notified in
advance of discussion. Students will have _____ weeks to discuss each topic.
a. five; five
b. two; two
c. five; two
d. two; five - Answer- five; two
Bacterial denitrification is an _______ process that converts NO3- to __________.
a. anaerobic; N2 (nitrogen gas)
b. aerobic; NH4+ (ammonium)
c. aerobic; N2 (nitrogen gas) - Answer- aerobic; N2 (nitrogen gas)
THE EXPERIMENT
Researchers wanted to determine if pesticide Z was effective at killing grasshoppers
that typically invade cornfields. Two ten-acre cornfields located 1 mile apart were
chosen. The cornfield to the west was sprayed only with water. The cornfield on the
east received the same amount of water with a 10% solution of pesticide Z. Samples
of the numbers of grasshoppers in the field were made every week for 10 weeks.
RESULTS
West field treated only with water:
The number of grasshoppers in the west field doubled after ten weeks.
East field treated with water and pesticide Z:
The number of grasshoppers in the east field declined by 50% after 10 weeks.
Based on the result of the experiment, which of the following is the most accurate
conclusion?
a. East fields are more likely than west fields to have problems with grasshoppers
eating corn crops.
b. Pesticide Z is a good way to control most insect infestation - Answer- If a cornfield
is sprayed with pesticide Z, it will have fewer grasshoppers 10 weeks later.
In 1910, President Theodore Roosevelt said "I recognize the right and duty of this
generation to develop and use the natural resources of our land; but I do not
recognize the right to waste them, or to rob, by wasteful use, the generations that
come after us." His message best reflects
a. an argument for economic growth.
b. a philosophy in conflict with Rachel Carson's.
c. a plea for good stewardship.
Questions and Answers
Which of the following are the three vital concepts that move societies toward a
sustainable future?
a. Sound science, sustainability, and stewardship
b. Sustainability, stewardship, and security
c. Stewardship, sound science, and security
d. Sound science, sustainability, and security - Answer- Sound science,
sustainability, and stewardship
Which of the following terms best describes the practice of environmental science?
a. Abstract
b. Integrative and interdisciplinary
c. Highly specialized
d. Theoretical - Answer- Integrative and interdisciplinary
Which one of the following is the broadest scope of ecological study?
a. Population ecology
b. Landscape ecology
c. Community ecology
d. Ecosystem ecology - Answer- Landscape ecology
With few exceptions, inorganic compounds do not have
a. carbon-hydrogen bonds or carbon-carbon bonds.
b. potassium-sodium bonds or hydrogen-chlorine bonds.
c. hydrogen-nitrogen bonds or carbon-oxygen bonds.
d. nitrogen-oxygen bonds or carbon-oxygen bonds. - Answer- carbon-hydrogen
bonds or carbon-carbon bonds.
All scientific investigations are initially founded upon
a. good observations.
b. an already accepted theory.
c. good experiments.
d. multiple hypotheses, some of which are unanswerable. - Answer- good
observations
An average person might consume 2,000 Kilocalories of food in one day. This is
enough energy to heat up how many 1-liter bottles of liquid water from 0 degrees
Celsius to 100 degrees Celsius (just reaching the boiling point of water, but not
turning the water into steam)?
a. 5 1-liter bottles
b. 1 1-liter bottle
c. 20 1-liter bottles
d. 10 1-liter bottles - Answer- 20 1-liter bottles
, As global climate change warms certain mountain ranges, the temperature optima
for the insect species living on the mountain is causing these insects to
a. move farther up the mountain.
b. move to a new biome.
c. move down the mountain.
d. become parasitic. - Answer- move farther up the mountain.
As stated in the ENVS 1126 syllabus (posted on Moodle) and explained in the first
class, there will be ______ graded class discussions via Moodle Forum this
semester. These discussions will help better understand important, timely
environmental issues that will be covered during the semester and encourage
students to share their thoughts with each other. Discussion topics will be notified in
advance of discussion. Students will have _____ weeks to discuss each topic.
a. five; five
b. two; two
c. five; two
d. two; five - Answer- five; two
Bacterial denitrification is an _______ process that converts NO3- to __________.
a. anaerobic; N2 (nitrogen gas)
b. aerobic; NH4+ (ammonium)
c. aerobic; N2 (nitrogen gas) - Answer- aerobic; N2 (nitrogen gas)
THE EXPERIMENT
Researchers wanted to determine if pesticide Z was effective at killing grasshoppers
that typically invade cornfields. Two ten-acre cornfields located 1 mile apart were
chosen. The cornfield to the west was sprayed only with water. The cornfield on the
east received the same amount of water with a 10% solution of pesticide Z. Samples
of the numbers of grasshoppers in the field were made every week for 10 weeks.
RESULTS
West field treated only with water:
The number of grasshoppers in the west field doubled after ten weeks.
East field treated with water and pesticide Z:
The number of grasshoppers in the east field declined by 50% after 10 weeks.
Based on the result of the experiment, which of the following is the most accurate
conclusion?
a. East fields are more likely than west fields to have problems with grasshoppers
eating corn crops.
b. Pesticide Z is a good way to control most insect infestation - Answer- If a cornfield
is sprayed with pesticide Z, it will have fewer grasshoppers 10 weeks later.
In 1910, President Theodore Roosevelt said "I recognize the right and duty of this
generation to develop and use the natural resources of our land; but I do not
recognize the right to waste them, or to rob, by wasteful use, the generations that
come after us." His message best reflects
a. an argument for economic growth.
b. a philosophy in conflict with Rachel Carson's.
c. a plea for good stewardship.
