Question 1

In modern societies,70% of human energy is used to produce food.

Accepted Answer

A) True 
 B)False

Question 2

In a modern society,approximately what percentage of human energy is used to produce food?

Accepted Answer

A) 10% 
B) 25% 
C) 45% 
D) 65% 
A) 10% 
B) 25% 
C) 45% 
D) 65%

Question 3

Of the following pesticides and their LD₅₀s (milligrams of pesticide/kg of rat)in rats,which pesticide is most toxic to rats?

Accepted Answer

A) pyrethrins (200-2600) 
B) nicotine (230) 
C) lindane (91) 
D) aldicarb (1) 
A) pyrethrins (200-2600) 
B) nicotine (230) 
C) lindane (91) 
D) aldicarb (1)

Question 4

If the world's population is growing at the rate of 1.5% per year,how many years will it take for the world's population to double?

Accepted Answer

A) 16 
B) 32 
C) 48 
D) 64 
A) 16 
B) 32 
C) 48 
D) 64

Question 5

Juvenile hormones are chemicals

Accepted Answer

A) that speed up the maturation of insects. 
B) that slow down the maturation of insects. 
C) that halt maturation of insects. 
D) that kill juvenile insects before they mature. 
A) that speed up the maturation of insects. 
B) that slow down the maturation of insects. 
C) that halt maturation of insects. 
D) that kill juvenile insects before they mature.

Question 6

The three primary plant nutrients found in fertilizers are nitrogen,magnesium and silicon.

Accepted Answer

A) True 
 B)False

Question 7

An experimental pesticide with a very specific action that is harmless to humans and other animals and completely biodegradable is

Accepted Answer

A) diazinon. 
B) parathion. 
C) chlorpyrifos. 
D) a viral pesticide. 
A) diazinon. 
B) parathion. 
C) chlorpyrifos. 
D) a viral pesticide.

Question 8

A 5-15-20 fertilizer has what percentage of N?

Accepted Answer

A) 5% 
B) 15% 
C) 20% 
D) none of these 
A) 5% 
B) 15% 
C) 20% 
D) none of these

Question 9

Pheromones are

Accepted Answer

A) chemical substances excreted by insects. 
B) a class of organophosphorus pesticides. 
C) natural insecticides produced by plants. 
D) human sex hormones. 
A) chemical substances excreted by insects. 
B) a class of organophosphorus pesticides. 
C) natural insecticides produced by plants. 
D) human sex hormones.

Question 10

DDT is concentrated in living organisms because it is

Accepted Answer

A) water soluble. 
B) fat soluble. 
C) synthetic. 
D) synthesized in the liver. 
A) water soluble. 
B) fat soluble. 
C) synthetic. 
D) synthesized in the liver.

Question 11

Which of the following nanoscale applications have been used for fertilizer and micronutrients?

Accepted Answer

A) distribution into ground that has been worked to have nano-sized pores. 
B) polystyrene nanoparticles 
C) zeolites 
D) zirconium oxide 
A) distribution into ground that has been worked to have nano-sized pores. 
B) polystyrene nanoparticles 
C) zeolites 
D) zirconium oxide

Question 12

Nano materials have been thoroughly tested and shown to be safe,because they are too small to be absorbed into cells

Accepted Answer

A) True 
 B)False

Question 13

The Haber process results in

Accepted Answer

A) the conversion of N₂ and H₂ to NH₃. 
B) the fixation of N₂ to form NO₃⁻. 
C) the combination of bone phosphate with sulfuric acid to form superphosphate. 
D) the mining of potassium chloride deposits by using an environmentally friendly method. 
A) the conversion of N₂ and H₂ to NH₃. 
B) the fixation of N₂ to form NO₃⁻. 
C) the combination of bone phosphate with sulfuric acid to form superphosphate. 
D) the mining of potassium chloride deposits by using an environmentally friendly method.

Question 14

Carbaryl is one type of carbamate pesticide.A major problem associated with carbaryl is its

Accepted Answer

A) persistence in the environment. 
B) toxicity towards honeybees. 
C) broad range of action. 
D) interference with egg production in birds. 
A) persistence in the environment. 
B) toxicity towards honeybees. 
C) broad range of action. 
D) interference with egg production in birds.

Question 15

DDT is particularly harmful to birds because it

Accepted Answer

A) interferes with digestion. 
B) interferes with calcium metabolism and egg production. 
C) accumulates in the heart. 
D) is fat insoluble. 
A) interferes with digestion. 
B) interferes with calcium metabolism and egg production. 
C) accumulates in the heart. 
D) is fat insoluble.

Question 16

Dioxin contaminants in Agent Orange have been linked to birth defects.

Accepted Answer

A) True 
 B)False

Question 17

The ultimate solution to the Malthusian dilemma is

Accepted Answer

A) ever increasing natural resources production. 
B) population control. 
C) better pesticides. 
D) more land available for farming. 
A) ever increasing natural resources production. 
B) population control. 
C) better pesticides. 
D) more land available for farming.

Question 18

Juvenile hormones act by speeding up insect development.

Accepted Answer

A) True 
 B)False

Question 19

DDT was NOT effective against

Accepted Answer

A) foxes. 
B) grapevine pests. 
C) lice. 
D) mosquitos. 
A) foxes. 
B) grapevine pests. 
C) lice. 
D) mosquitos.

Question 20

There is still much arable land on Earth that has not been used for cultivation.

Accepted Answer

A) True 
 B)False

Exam 20: Chemistry Down on the Farm

In modern societies,70% of human energy is used to produce food.

In a modern society,approximately what percentage of human energy is used to produce food?

Of the following pesticides and their LD₅₀s (milligrams of pesticide/kg of rat)in rats,which pesticide is most toxic to rats?

If the world's population is growing at the rate of 1.5% per year,how many years will it take for the world's population to double?

Juvenile hormones are chemicals

The three primary plant nutrients found in fertilizers are nitrogen,magnesium and silicon.

An experimental pesticide with a very specific action that is harmless to humans and other animals and completely biodegradable is

A 5-15-20 fertilizer has what percentage of N?

Pheromones are

DDT is concentrated in living organisms because it is

Which of the following nanoscale applications have been used for fertilizer and micronutrients?

Nano materials have been thoroughly tested and shown to be safe,because they are too small to be absorbed into cells

The Haber process results in

Carbaryl is one type of carbamate pesticide.A major problem associated with carbaryl is its

DDT is particularly harmful to birds because it

Dioxin contaminants in Agent Orange have been linked to birth defects.

The ultimate solution to the Malthusian dilemma is

Juvenile hormones act by speeding up insect development.

DDT was NOT effective against

There is still much arable land on Earth that has not been used for cultivation.

Chemistry

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