Question 1

Most fresh water lakes ________.

Accepted Answer

A)  contain no dissolved salts 
B)  contain dissolved salts 
C)  have a neutral pH 
D)  lie outside of the water cycle 
A)  contain no dissolved salts 
B)  contain dissolved salts 
C)  have a neutral pH 
D)  lie outside of the water cycle

Question 2

Shown below are the N-P-K ratings for three fertilizer additives: sawdust, fish meal, and wood ashes. Using what you know about the chemical composition of these substances, assign each to its most likely n-p-k rating. 5-3-3 0-1.5-8 0.2-0-0.2

Accepted Answer

A)  sawdust: 5-3-3; fish meal: 0-1.5-8; wood ashes: 0.2-0-0.2 
B)  sawdust: 0-1.5-8; fish meal: 0.2-0-0.2; wood ashes: 5-3-3 
C)  sawdust: 0.2-0-0.2; fish meal: 5-3-3; wood ashes: 0-1.5-8 
D)  sawdust: 0.2-0-0.2; fish meal: 0-1.5-8; wood ashes: 5-3-3 
A)  sawdust: 5-3-3; fish meal: 0-1.5-8; wood ashes: 0.2-0-0.2 
B)  sawdust: 0-1.5-8; fish meal: 0.2-0-0.2; wood ashes: 5-3-3 
C)  sawdust: 0.2-0-0.2; fish meal: 5-3-3; wood ashes: 0-1.5-8 
D)  sawdust: 0.2-0-0.2; fish meal: 0-1.5-8; wood ashes: 5-3-3

Question 3

Which of the following is not a side effect of poor soil management?

Accepted Answer

A)  The topsoil layer gets thicker and thicker. 
B)  Materials begin to leach from soil at a higher rate. 
C)  The organic content of the soil decreases. 
D)  Greater amounts of fertilizer need to be used to promote fertility. 
E)  The soil particles start to decrease in size. 
A)  The topsoil layer gets thicker and thicker. 
B)  Materials begin to leach from soil at a higher rate. 
C)  The organic content of the soil decreases. 
D)  Greater amounts of fertilizer need to be used to promote fertility. 
E)  The soil particles start to decrease in size.

Question 4

The N-P-K system is used to describe ________.

Accepted Answer

A)  the relative amounts of nitrogen, phosphorus and potassium in mixed fertilizers 
B)  the identity of a straight fertilizer 
C)  the climate zone in which a fertilizer works best 
D)  the pounds of nickel, potassium, and krypton in a bag of mixed fertilizer 
E)  B and C 
A)  the relative amounts of nitrogen, phosphorus and potassium in mixed fertilizers 
B)  the identity of a straight fertilizer 
C)  the climate zone in which a fertilizer works best 
D)  the pounds of nickel, potassium, and krypton in a bag of mixed fertilizer 
E)  B and C

Question 5

How does microirrigation help prevent salinization?

Accepted Answer

A)  There is almost no evaporation, so minerals are consumed solely by plants. 
B)  Large amounts of water flush the soil and keep the toxic salts from building up. 
C)  The plants are injected directly with nutrient rich water. 
D)  Fertilizer is not used so there is no excess salts present in the waste water. 
E)  all of the above 
A)  There is almost no evaporation, so minerals are consumed solely by plants. 
B)  Large amounts of water flush the soil and keep the toxic salts from building up. 
C)  The plants are injected directly with nutrient rich water. 
D)  Fertilizer is not used so there is no excess salts present in the waste water. 
E)  all of the above

Question 6

How does inert organic bulk of compost help to maintain fertile soil conditions?

Accepted Answer

A)  The organic bulk provides for open spaces into which the roots may grow. 
B)  The organic bulk adds nutrients to the soil. 
C)  The organic bulk provides open spaces for water and air. 
D)  The organic bulk decomposes into a pulp rich in nitrogen. 
A)  The organic bulk provides for open spaces into which the roots may grow. 
B)  The organic bulk adds nutrients to the soil. 
C)  The organic bulk provides open spaces for water and air. 
D)  The organic bulk decomposes into a pulp rich in nitrogen.

Question 7

Organophosphorus and carbamate insecticides ________.

Accepted Answer

A)  do not kill pests that have developed a resistance to other insecticides 
B)  readily decompose to water-soluble compounds that can be carried away by rainwater 
C)  kill weeds in addition to killing insects 
D)  do not affect animals such as honey bees 
E)  all of the above 
A)  do not kill pests that have developed a resistance to other insecticides 
B)  readily decompose to water-soluble compounds that can be carried away by rainwater 
C)  kill weeds in addition to killing insects 
D)  do not affect animals such as honey bees 
E)  all of the above

Question 8

What are the chances that you have already ingested a product made from a transgenic organism?

Accepted Answer

A)  Transgenic organisms won't likely be entering our food supply for another several years. 
B)  There is a slight chance because of the recently introduced organic food program of the U.S. Department of Agriculture. 
C)  There is a moderate chance, especially for consumers of red meat. 
D)  Because foods developed from transgenic organisms have been on the market for many years, the chances are great. 
A)  Transgenic organisms won't likely be entering our food supply for another several years. 
B)  There is a slight chance because of the recently introduced organic food program of the U.S. Department of Agriculture. 
C)  There is a moderate chance, especially for consumers of red meat. 
D)  Because foods developed from transgenic organisms have been on the market for many years, the chances are great.

Question 9

Which of the following is considered the smallest rock particle found in soil?

Accepted Answer

A)  clay 
B)  silt 
C)  sand 
D)  humus 
E)  subsoil 
A)  clay 
B)  silt 
C)  sand 
D)  humus 
E)  subsoil

Question 10

The use of tractors and other heavy farm machinery compacts soil. How might this compacting affect soil fertility?

Accepted Answer

A)  The soil fertility is harmed because the weight of the heavy machinery squeezes out the water. 
B)  The increased pressure causes fertilizer molecules to react with one another, which has the effect of harming soil fertility. 
C)  Once compacted the soil is not able to hold water and air, which harms the fertility. 
D)  The weight of the heavy machinery kills decomposers, such as worms, which has the effect of harming soil fertility. 
A)  The soil fertility is harmed because the weight of the heavy machinery squeezes out the water. 
B)  The increased pressure causes fertilizer molecules to react with one another, which has the effect of harming soil fertility. 
C)  Once compacted the soil is not able to hold water and air, which harms the fertility. 
D)  The weight of the heavy machinery kills decomposers, such as worms, which has the effect of harming soil fertility.

Question 11

DDT has a strong affinity for fat tissue because, like fat tissue, DDT is ________.

Accepted Answer

A)  polar and so the two are attracted to each other 
B)  nonpolar and equally repelled by water 
C)  nonpolar and so the two are attracted to each other 
D)  nonpolar and so the two are held by induced dipole-induced dipole attractions 
A)  polar and so the two are attracted to each other 
B)  nonpolar and equally repelled by water 
C)  nonpolar and so the two are attracted to each other 
D)  nonpolar and so the two are held by induced dipole-induced dipole attractions

Question 12

Which of the following soil horizons contains an equal mixture of clay, sand and silt?

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 13

What is the main product of the Haber process?

Accepted Answer

A)  NH3 
B)  compost 
C)  NH4NO3 
D)  N2 
E)  H2 
A)  NH3 
B)  compost 
C)  NH4NO3 
D)  N2 
E)  H2

Question 14

Describe which level of the food chain the following statement illustrates: You are a strict vegetarian (no eggs, milk or fish).

Accepted Answer

A)  primary consumer 
B)  carnivore 
C)  secondary consumer 
D)  quaternary consumer 
E)  decomposer 
A)  primary consumer 
B)  carnivore 
C)  secondary consumer 
D)  quaternary consumer 
E)  decomposer

Question 15

Many farmers in the U.S are paid by the government not to farm their land. Based on your understanding of the concepts presented in this chapter, cite one reason why this might be so.

Accepted Answer

A)  It provides a means of controlling the global population of people. 
B)  Farmed land has dramatic effects on local weather patterns. 
C)  to conserve the topsoil 
D)  to keep the price of food artificially high 
A)  It provides a means of controlling the global population of people. 
B)  Farmed land has dramatic effects on local weather patterns. 
C)  to conserve the topsoil 
D)  to keep the price of food artificially high

Question 16

What is the difference between synthetic and natural fertilizers?

Accepted Answer

A)  There is no difference chemically, just that synthetics are mixed in different proportions. 
B)  Synthetics come from artificial processes such as the Haber process. 
C)  Natural fertilizers are all mined. 
D)  Natural fertilizers are all obtained from decay of organic matter. 
E)  none of the above 
A)  There is no difference chemically, just that synthetics are mixed in different proportions. 
B)  Synthetics come from artificial processes such as the Haber process. 
C)  Natural fertilizers are all mined. 
D)  Natural fertilizers are all obtained from decay of organic matter. 
E)  none of the above

Question 17

What is the safest and most beneficial way to control weeds?

Accepted Answer

A)  plowing them under the soil where they can decompose 
B)  massive amounts of insecticide 
C)  massive amounts of herbicide 
D)  all of the above 
E)  A and B only 
A)  plowing them under the soil where they can decompose 
B)  massive amounts of insecticide 
C)  massive amounts of herbicide 
D)  all of the above 
E)  A and B only

Question 18

Which of the following is a transgenic organism?

Accepted Answer

A)  a bacteria that can produce bovine (cow) growth hormone 
B)  a clone of a sheep 
C)  a prize bull that has been bred for size and flavor 
D)  broccoflower (a cross between broccoli and cauliflower) 
E)  all of the above 
A)  a bacteria that can produce bovine (cow) growth hormone 
B)  a clone of a sheep 
C)  a prize bull that has been bred for size and flavor 
D)  broccoflower (a cross between broccoli and cauliflower) 
E)  all of the above

Question 19

Which of the following soil horizons contains the most organic matter?

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 20

Which of the following is not part of integrated crop management?

Accepted Answer

A)  passing legislation that lowers the restrictions on pesticide use 
B)  identifying the best set of crops for a given location 
C)  determining ideal crop rotation strategies 
D)  choosing the best crop for the current agricultural market 
E)  all of the above 
A)  passing legislation that lowers the restrictions on pesticide use 
B)  identifying the best set of crops for a given location 
C)  determining ideal crop rotation strategies 
D)  choosing the best crop for the current agricultural market 
E)  all of the above

Most fresh water lakes ________.

Shown below are the N-P-K ratings for three fertilizer additives: sawdust, fish meal, and wood ashes. Using what you know about the chemical composition of these substances, assign each to its most likely n-p-k rating. 5-3-3 0-1.5-8 0.2-0-0.2

Which of the following is not a side effect of poor soil management?

The N-P-K system is used to describe ________.

How does microirrigation help prevent salinization?

How does inert organic bulk of compost help to maintain fertile soil conditions?

Organophosphorus and carbamate insecticides ________.

What are the chances that you have already ingested a product made from a transgenic organism?

Which of the following is considered the smallest rock particle found in soil?

The use of tractors and other heavy farm machinery compacts soil. How might this compacting affect soil fertility?

DDT has a strong affinity for fat tissue because, like fat tissue, DDT is ________.

Which of the following soil horizons contains an equal mixture of clay, sand and silt?

What is the main product of the Haber process?

Describe which level of the food chain the following statement illustrates: You are a strict vegetarian (no eggs, milk or fish).

Many farmers in the U.S are paid by the government not to farm their land. Based on your understanding of the concepts presented in this chapter, cite one reason why this might be so.

What is the difference between synthetic and natural fertilizers?

What is the safest and most beneficial way to control weeds?

Which of the following is a transgenic organism?

Which of the following soil horizons contains the most organic matter?

Which of the following is not part of integrated crop management?

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

Exam 15: Optimizing Food Production

Most fresh water lakes ________.

Shown below are the N-P-K ratings for three fertilizer additives: sawdust, fish meal, and wood ashes. Using what you know about the chemical composition of these substances, assign each to its most likely n-p-k rating. 5-3-3 0-1.5-8 0.2-0-0.2

Which of the following is not a side effect of poor soil management?

The N-P-K system is used to describe ________.

How does microirrigation help prevent salinization?

How does inert organic bulk of compost help to maintain fertile soil conditions?

Organophosphorus and carbamate insecticides ________.

What are the chances that you have already ingested a product made from a transgenic organism?

Which of the following is considered the smallest rock particle found in soil?

The use of tractors and other heavy farm machinery compacts soil. How might this compacting affect soil fertility?

DDT has a strong affinity for fat tissue because, like fat tissue, DDT is ________.

Which of the following soil horizons contains an equal mixture of clay, sand and silt?

What is the main product of the Haber process?

Describe which level of the food chain the following statement illustrates: You are a strict vegetarian (no eggs, milk or fish).

Many farmers in the U.S are paid by the government not to farm their land. Based on your understanding of the concepts presented in this chapter, cite one reason why this might be so.

What is the difference between synthetic and natural fertilizers?

What is the safest and most beneficial way to control weeds?

Which of the following is a transgenic organism?

Which of the following soil horizons contains the most organic matter?

Which of the following is not part of integrated crop management?

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