ENVS 1126 AIXIN HOU-EXAM 1 QUESTIONS AND
VERIFIED ANSWERS LATEST 2025-2026 UPDATE
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-anaerobic; 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.
d. an argument against sustainable agriculture. - Answer-a plea for good
stewardship.
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
VERIFIED ANSWERS LATEST 2025-2026 UPDATE
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-anaerobic; 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.
d. an argument against sustainable agriculture. - Answer-a plea for good
stewardship.
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
