Question 1

Which of the following soil horizons is the closest to the surface?

Accepted Answer

A)  substratum 
B)  subsoil 
C)  topsoil 
D)  bottom soil 
E)  humus 
A)  substratum 
B)  subsoil 
C)  topsoil 
D)  bottom soil 
E)  humus

Question 2

Which of the following is the cause of soil losing its fertility?

Accepted Answer

A)  plants extract nutrients from the soil 
B)  leaching extracts nutrients from the soil 
C)  not adding enough fertilizer 
D)  all of the above 
E)  only A and B 
A)  plants extract nutrients from the soil 
B)  leaching extracts nutrients from the soil 
C)  not adding enough fertilizer 
D)  all of the above 
E)  only A and B

Question 3

Besides lure-and-trap, how else might pheromones be used to decrease insect populations?

Accepted Answer

A)  use a pheromone that insects detect as a warning system 
B)  Spray insect-attracting pheromones right on the plant. The many species of insects that collect will compete and potentially kill each other. 
C)  Concentrated solutions of pheromones tend to dissolve the chitin of which insect are made. 
D)  all of the above 
A)  use a pheromone that insects detect as a warning system 
B)  Spray insect-attracting pheromones right on the plant. The many species of insects that collect will compete and potentially kill each other. 
C)  Concentrated solutions of pheromones tend to dissolve the chitin of which insect are made. 
D)  all of the above

Question 4

How might periodic floods from rainstorms benefit irrigated cropland?

Accepted Answer

A)  by washing away weeds and ground burrowing insects 
B)  by saturating surface soil with rainwater 
C)  by removing the top layer of soil and exposing the nutrient-rich soil beneath 
D)  by removing much of the accumulated salt deposits 
A)  by washing away weeds and ground burrowing insects 
B)  by saturating surface soil with rainwater 
C)  by removing the top layer of soil and exposing the nutrient-rich soil beneath 
D)  by removing much of the accumulated salt deposits

Question 5

Which of the following is an organic farming method?

Accepted Answer

A)  the use of fertilizers that contain only organic compounds 
B)  the use of fertilizers that contain inorganic compounds 
C)  the use of fertilizers that contain only synthetic fertilizers 
D)  the use of organic compounds that act as pesticides 
E)  none of the above 
A)  the use of fertilizers that contain only organic compounds 
B)  the use of fertilizers that contain inorganic compounds 
C)  the use of fertilizers that contain only synthetic fertilizers 
D)  the use of organic compounds that act as pesticides 
E)  none of the above

Question 6

How does microirrigation help prevent erosion?

Accepted Answer

A)  by keeping water levels so low that there is no runoff 
B)  by putting micro-dams around fields, which prevents the silty water from escaping 
C)  by increasing the ability of plants to convert subsoil into topsoil 
D)  by increasing the depth of the roots, which in turn holds more topsoil 
E)  none of the above 
A)  by keeping water levels so low that there is no runoff 
B)  by putting micro-dams around fields, which prevents the silty water from escaping 
C)  by increasing the ability of plants to convert subsoil into topsoil 
D)  by increasing the depth of the roots, which in turn holds more topsoil 
E)  none of the above

Question 7

Which of the following soil horizons is the deepest?

Accepted Answer

A)  substratum 
B)  subsoil 
C)  topsoil 
D)  bottom soil 
E)  humus 
A)  substratum 
B)  subsoil 
C)  topsoil 
D)  bottom soil 
E)  humus

Question 8

How can a pheromone be used to limit pesticide use?

Accepted Answer

A)  to lure pests to traps 
B)  to lure pests to locations where only a little pesticide has been applied 
C)  to suppress the sex drive of the pests 
D)  to sterilize the insects 
E)  only A or B 
A)  to lure pests to traps 
B)  to lure pests to locations where only a little pesticide has been applied 
C)  to suppress the sex drive of the pests 
D)  to sterilize the insects 
E)  only A or B

Question 9

Which of the following statements is true about water and soil?

Accepted Answer

A)  Water will flow faster through denser soil. 
B)  Soil that drains water very slowly is better for plants. 
C)  Soil that drains very quickly is better for plants. 
D)  Leaching is a beneficial way to remove harmful side products. 
E)  none of the above 
A)  Water will flow faster through denser soil. 
B)  Soil that drains water very slowly is better for plants. 
C)  Soil that drains very quickly is better for plants. 
D)  Leaching is a beneficial way to remove harmful side products. 
E)  none of the above

Question 10

How can satellite images and the global positioning system help against farm pests?

Accepted Answer

A)  They allow for the minimum amount of pesticide to be applied to just the infected crop area. 
B)  They give information about wind patterns, which allows pesticide to be sprayed safely. 
C)  The images can be used to navigate farm machinery that manually removes the pests from the plant stalks. 
D)  so we can target those little buggers from space with our orbiting laser satellites 
E)  none of the above 
A)  They allow for the minimum amount of pesticide to be applied to just the infected crop area. 
B)  They give information about wind patterns, which allows pesticide to be sprayed safely. 
C)  The images can be used to navigate farm machinery that manually removes the pests from the plant stalks. 
D)  so we can target those little buggers from space with our orbiting laser satellites 
E)  none of the above

Question 11

What potentially negative aspects of chlorinated hydrocarbons like DDT make them potentially detrimental to the environment?

Accepted Answer

A)  They are not water soluble. 
B)  They do not degrade rapidly. 
C)  They accumulate in fat. 
D)  all of the above 
E)  only A and B 
A)  They are not water soluble. 
B)  They do not degrade rapidly. 
C)  They accumulate in fat. 
D)  all of the above 
E)  only A and B

Question 12

Why might soil with a very low pH be more susceptible to leaching?

Accepted Answer

A)  The acid ions exchange with the nutrient ions, which then are rinsed away. 
B)  The acid ions decompose the vitamins and minerals stored in the roots. 
C)  The base ions start to degrade the minerals and lead to insoluble ion salts. 
D)  The base ions decompose the vitamins and minerals stored in the roots and suck the valuable minerals into the water. 
E)  none of the above 
A)  The acid ions exchange with the nutrient ions, which then are rinsed away. 
B)  The acid ions decompose the vitamins and minerals stored in the roots. 
C)  The base ions start to degrade the minerals and lead to insoluble ion salts. 
D)  The base ions decompose the vitamins and minerals stored in the roots and suck the valuable minerals into the water. 
E)  none of the above

Question 13

Which of the following is an advantage of modern farming practices?

Accepted Answer

A)  high crop yield 
B)  pesticide damage to the environment 
C)  depletion of soil nutrients 
D)  fertilizer build-up in ground water 
E)  All of the above are advantages. 
A)  high crop yield 
B)  pesticide damage to the environment 
C)  depletion of soil nutrients 
D)  fertilizer build-up in ground water 
E)  All of the above are advantages.

Question 14

What do you expect the pH of a soil sample to be if the geology in the area was composed of a large amount of calcium carbonate (CaCO3)?

Accepted Answer

A)  low pH 
B)  high pH 
C)  negative pH 
D)  neutral pH 
E)  Calcium carbonate has no effect on pH. 
A)  low pH 
B)  high pH 
C)  negative pH 
D)  neutral pH 
E)  Calcium carbonate has no effect on pH.

Question 15

Which of the following foods would make you a secondary consumer?

Accepted Answer

A)  lentils 
B)  chicken 
C)  shark steak 
D)  all of the above 
E)  none of the above 
A)  lentils 
B)  chicken 
C)  shark steak 
D)  all of the above 
E)  none of the above

Question 16

Why do the leaves of plants deficient in nitrogen turn yellow?

Accepted Answer

A)  It signals farmers to provide additional fertilizer. 
B)  Plants deficient in nitrogen have a hard time producing chlorophyll. 
C)  Without nitrogen, the fluids in the plant turn acidic. 
D)  The nitrogen protects the plant from the sun's harmful ultraviolet rays. 
A)  It signals farmers to provide additional fertilizer. 
B)  Plants deficient in nitrogen have a hard time producing chlorophyll. 
C)  Without nitrogen, the fluids in the plant turn acidic. 
D)  The nitrogen protects the plant from the sun's harmful ultraviolet rays.

Question 17

Which of the following statements is true?

Accepted Answer

A)  Plants cannot obtain nitrogen directly from the air. 
B)  The roots of a plant provide nitrogen required for plant growth. 
C)  Lightning striking the soil is the leading cause of water soluble nitrogen salts. 
D)  All of the above are true. 
E)  none of the above 
A)  Plants cannot obtain nitrogen directly from the air. 
B)  The roots of a plant provide nitrogen required for plant growth. 
C)  Lightning striking the soil is the leading cause of water soluble nitrogen salts. 
D)  All of the above are true. 
E)  none of the above

Question 18

Which of the following soil horizons contains primarily clay?

Accepted Answer

A)  substratum 
B)  subsoil 
C)  topsoil 
D)  bottom soil 
E)  humus 
A)  substratum 
B)  subsoil 
C)  topsoil 
D)  bottom soil 
E)  humus

Question 19

What do you expect the pH of a soil sample to be that has a large amount of humus in it?

Accepted Answer

A)  low pH 
B)  high pH 
C)  negative pH 
D)  neutral pH 
E)  Humus has no effect on pH. 
A)  low pH 
B)  high pH 
C)  negative pH 
D)  neutral pH 
E)  Humus has no effect on pH.

Question 20

What is a similarity between pesticides and medical drugs?

Accepted Answer

A)  They need to selectively target the invader but not harm the host. 
B)  They have to have a minimum amount of side effects. 
C)  They should be readily decomposed into non-harmful byproducts. 
D)  all of the above 
E)  only A and B 
A)  They need to selectively target the invader but not harm the host. 
B)  They have to have a minimum amount of side effects. 
C)  They should be readily decomposed into non-harmful byproducts. 
D)  all of the above 
E)  only A and B

Which of the following soil horizons is the closest to the surface?

Which of the following is the cause of soil losing its fertility?

Besides lure-and-trap, how else might pheromones be used to decrease insect populations?

How might periodic floods from rainstorms benefit irrigated cropland?

Which of the following is an organic farming method?

How does microirrigation help prevent erosion?

Which of the following soil horizons is the deepest?

How can a pheromone be used to limit pesticide use?

Which of the following statements is true about water and soil?

How can satellite images and the global positioning system help against farm pests?

What potentially negative aspects of chlorinated hydrocarbons like DDT make them potentially detrimental to the environment?

Why might soil with a very low pH be more susceptible to leaching?

Which of the following is an advantage of modern farming practices?

What do you expect the pH of a soil sample to be if the geology in the area was composed of a large amount of calcium carbonate (CaCO₃)?

Which of the following foods would make you a secondary consumer?

Why do the leaves of plants deficient in nitrogen turn yellow?

Which of the following statements is true?

Which of the following soil horizons contains primarily clay?

What do you expect the pH of a soil sample to be that has a large amount of humus in it?

What is a similarity between pesticides and medical drugs?

About Science

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Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

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Exam 15: Optimizing Food Production

Which of the following soil horizons is the closest to the surface?

Which of the following is the cause of soil losing its fertility?

Besides lure-and-trap, how else might pheromones be used to decrease insect populations?

How might periodic floods from rainstorms benefit irrigated cropland?

Which of the following is an organic farming method?

How does microirrigation help prevent erosion?

Which of the following soil horizons is the deepest?

How can a pheromone be used to limit pesticide use?

Which of the following statements is true about water and soil?

How can satellite images and the global positioning system help against farm pests?

What potentially negative aspects of chlorinated hydrocarbons like DDT make them potentially detrimental to the environment?

Why might soil with a very low pH be more susceptible to leaching?

Which of the following is an advantage of modern farming practices?

What do you expect the pH of a soil sample to be if the geology in the area was composed of a large amount of calcium carbonate (CaCO3)?

Which of the following foods would make you a secondary consumer?

Why do the leaves of plants deficient in nitrogen turn yellow?

Which of the following statements is true?

Which of the following soil horizons contains primarily clay?

What do you expect the pH of a soil sample to be that has a large amount of humus in it?

What is a similarity between pesticides and medical drugs?

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Protection Water and Air Resources

Capturing Energy

Filters

What do you expect the pH of a soil sample to be if the geology in the area was composed of a large amount of calcium carbonate (CaCO₃)?