Chemistry of Pesticides and Fertilizers in the Environment
Chemistry ⇒ Environmental Chemistry
Chemistry of Pesticides and Fertilizers in the Environment starts at 11 and continues till grade 12.
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Describe how the use of pesticides can affect pollinator populations.
Describe how the use of pesticides can lead to the development of resistant pest populations.
Describe how the use of slow-release fertilizers can benefit the environment.
Describe the environmental impact of using excessive phosphate fertilizers.
Describe the role of chelating agents in micronutrient fertilizers.
Describe two ways in which fertilizers can contaminate groundwater.
Explain the difference between persistent and non-persistent pesticides.
A farmer applies 200 kg of a fertilizer containing 20% phosphorus pentoxide (P2O5). Calculate the mass of P2O5 applied.
Which element is commonly found in phosphate fertilizers? (1) Nitrogen (2) Phosphorus (3) Potassium (4) Calcium
Which of the following is a benefit of using biofertilizers? (1) Increased chemical pollution (2) Improved soil health (3) Reduced crop yields (4) Increased greenhouse gas emissions
Which of the following is a characteristic of a good pesticide? (1) High toxicity to non-target species (2) High persistence in the environment (3) Selective toxicity to target pests (4) High bioaccumulation potential
Which of the following is a common method for reducing pesticide pollution? (1) Crop rotation (2) Integrated pest management (3) Use of genetically modified crops (4) All of the above
Fill in the blank: The chemical formula for urea, a common nitrogen fertilizer, is __________.
Fill in the blank: The main chemical component of superphosphate fertilizer is __________.
Fill in the blank: The main environmental risk of using atrazine, a common herbicide, is contamination of __________.
Fill in the blank: The main nutrient supplied by muriate of potash fertilizer is __________.
True or False: DDT is a biodegradable pesticide.
True or False: Organophosphate pesticides are less toxic to humans than organochlorine pesticides.
True or False: Pesticide drift refers to the movement of pesticides from the target area to non-target areas by wind or water.
True or False: Potassium fertilizers are mainly responsible for acidification of soils.
