Question 1

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 2

Which of the following is not a consumer?

Accepted Answer

A) phytoplankton 
B) zooplankton 
C) carnivores 
D) Only A and B are not consumers. 
A) phytoplankton 
B) zooplankton 
C) carnivores 
D) Only A and B are not consumers.

Question 3

Which of the following is the source of organic components in soils?

Accepted Answer

A) clay 
B) sand 
C) silt 
D) mineral particles 
E) humus 
A) clay 
B) sand 
C) silt 
D) mineral particles 
E) humus

Question 4

Which of the following would not illustrate part of the trophic structure of an ecosystem?

Accepted Answer

A) plants absorbing carbon dioxide to make sugars 
B) grasshoppers eating plants 
C) racoons digging in your trash for your discarded food 
D) skunks releasing a powerful scent to dissuade predators 
E) all of the above 
A) plants absorbing carbon dioxide to make sugars 
B) grasshoppers eating plants 
C) racoons digging in your trash for your discarded food 
D) skunks releasing a powerful scent to dissuade predators 
E) all of the above

Question 5

Pockets of open space in soil are necessary for plant health. If these pockets are too large, however, plant health suffers. Why?

Accepted Answer

A) Large open pockets of air fill with carbon dioxide, which lowers the pH of the soil to unhealthy levels. 
B) When a root encounters a large pocket of air it is less able to absorb the nutrients it needs because it is no longer in contact with the soil. 
C) When a large pocket of air collapses it hits the root damaging it and making it more susceptible to infection. 
D) Water is not retained well by large open spaces in the soil, which means that plant nutrients are readily leached from the soil. 
A) Large open pockets of air fill with carbon dioxide, which lowers the pH of the soil to unhealthy levels. 
B) When a root encounters a large pocket of air it is less able to absorb the nutrients it needs because it is no longer in contact with the soil. 
C) When a large pocket of air collapses it hits the root damaging it and making it more susceptible to infection. 
D) Water is not retained well by large open spaces in the soil, which means that plant nutrients are readily leached from the soil.

Question 6

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 7

A low soil pH ________.

Accepted Answer

A) helps the soil retain nutrients 
B) displaces negatively charged nutrients 
C) displaces positively charged nutrients 
D) promotes percolation 
A) helps the soil retain nutrients 
B) displaces negatively charged nutrients 
C) displaces positively charged nutrients 
D) promotes percolation

Question 8

In 1913, the German chemist Fritz Haber developed a process for producing ________.

Accepted Answer

A) sulfates 
B) ammonia 
C) mixed fertilizer 
D) lime 
A) sulfates 
B) ammonia 
C) mixed fertilizer 
D) lime

Question 9

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 10

In what ways are the roots of a plant like an ion-exchanger used to purify hard water?

Accepted Answer

A) The roots release ions, which exchange with the mineral ions in the soil. 
B) The plant roots purify water. 
C) The plant roots trap ions in the water and store them until recharged. 
D) all of the above 
E) none of the above 
A) The roots release ions, which exchange with the mineral ions in the soil. 
B) The plant roots purify water. 
C) The plant roots trap ions in the water and store them until recharged. 
D) all of the above 
E) none of the above

Question 11

How does crop rotation act to prevent pest infections?

Accepted Answer

A) Pests are often crop specific. 
B) Pests are damaged by nitrogen fixing crops. 
C) Crops are only susceptible to pests at certain times of the planting season. 
D) Crops release certain toxins that kill pests. 
E) all of the above 
A) Pests are often crop specific. 
B) Pests are damaged by nitrogen fixing crops. 
C) Crops are only susceptible to pests at certain times of the planting season. 
D) Crops release certain toxins that kill pests. 
E) all of the above

Question 12

Which of the following soil horizons would be structurally the most similar to bedrock?

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

Why does organic farming exclude the use of pesticides when pesticides themselves are organic?

Accepted Answer

A) Organic pesticides are a type of chemical. 
B) Organic pesticides tend not to decompose by natural means. 
C) Pesticides made from organic chemicals tend to taste bad. 
D) The word "organic" of organic farming is used in a different context. 
A) Organic pesticides are a type of chemical. 
B) Organic pesticides tend not to decompose by natural means. 
C) Pesticides made from organic chemicals tend to taste bad. 
D) The word "organic" of organic farming is used in a different context.

Question 14

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 15

Which of the following forms of nitrogen is most readily accessible to plants?

Accepted Answer

A) NO3- 
B) NH4+ 
C) N2 
D) N2O 
E) A and B 
A) NO3- 
B) NH4+ 
C) N2 
D) N2O 
E) A and B

Question 16

Why do groundskeepers poke holes in football fields?

Accepted Answer

A) This helps the water to drain from the field when it rains. 
B) It makes it easier for air to enter the soil. 
C) To counteract the effect that the player's cleats have on the soil. 
D) To prevent the grass from growing too thick. 
A) This helps the water to drain from the field when it rains. 
B) It makes it easier for air to enter the soil. 
C) To counteract the effect that the player's cleats have on the soil. 
D) To prevent the grass from growing too thick.

Question 17

Which of the following has the greatest amount of food energy available to it?

Accepted Answer

A) a grasshopper 
B) a cat 
C) a mouse 
D) a dog 
E) All of the above are equal. 
A) a grasshopper 
B) a cat 
C) a mouse 
D) a dog 
E) All of the above are equal.

Question 18

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 19

What is the source of all the carbon in trees and other plants?

Accepted Answer

A) carbohydrates 
B) chlorophyll 
C) carbon dioxide 
D) oxygen 
E) water 
A) carbohydrates 
B) chlorophyll 
C) carbon dioxide 
D) oxygen 
E) water

Question 20

Which of the following is a straight fertilizer?

Accepted Answer

A) NH3 
B) NaNO3 
C) NH4NO2 
D) All of the above are straight fertilizers. 
E) These are all synthetic fertilizers. 
A) NH3 
B) NaNO3 
C) NH4NO2 
D) All of the above are straight fertilizers. 
E) These are all synthetic fertilizers.

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

Which of the following is not a consumer?

Which of the following is the source of organic components in soils?

Which of the following would not illustrate part of the trophic structure of an ecosystem?

Pockets of open space in soil are necessary for plant health. If these pockets are too large, however, plant health suffers. Why?

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

A low soil pH ________.

In 1913, the German chemist Fritz Haber developed a process for producing ________.

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

In what ways are the roots of a plant like an ion-exchanger used to purify hard water?

How does crop rotation act to prevent pest infections?

Which of the following soil horizons would be structurally the most similar to bedrock?

Why does organic farming exclude the use of pesticides when pesticides themselves are organic?

Most fresh water lakes ________.

Which of the following forms of nitrogen is most readily accessible to plants?

Why do groundskeepers poke holes in football fields?

Which of the following has the greatest amount of food energy available to it?

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

What is the source of all the carbon in trees and other plants?

Which of the following is a straight fertilizer?

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

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

Which of the following is not a consumer?

Which of the following is the source of organic components in soils?

Which of the following would not illustrate part of the trophic structure of an ecosystem?

Pockets of open space in soil are necessary for plant health. If these pockets are too large, however, plant health suffers. Why?

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

A low soil pH ________.

In 1913, the German chemist Fritz Haber developed a process for producing ________.

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

In what ways are the roots of a plant like an ion-exchanger used to purify hard water?

How does crop rotation act to prevent pest infections?

Which of the following soil horizons would be structurally the most similar to bedrock?

Why does organic farming exclude the use of pesticides when pesticides themselves are organic?

Most fresh water lakes ________.

Which of the following forms of nitrogen is most readily accessible to plants?

Why do groundskeepers poke holes in football fields?

Which of the following has the greatest amount of food energy available to it?

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

What is the source of all the carbon in trees and other plants?

Which of the following is a straight fertilizer?

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