Module 1a
Farming system where produce is consumed by farmer and immediate family and excess produce is often sold
Subsistence Farming
Farming system with the highest productivity
Commercial farming
The ability to do work
Energy
An unwanted change to the environment caused by the introduction of harmful materials or production of harmful conditions
Pollution
A measure of how long a substance stays in the environment before it is degraded or broken down
Persistence
The processing of raw materials and intermediate products derived from the agricultural sector
Agroprocessing
The breeding, rearing, and harvesting of fish, shellfish, algae, and other organisms in fresh water environments.
Aquaculture
Energy which a body possesses due to motion
Kinetic energy
The combination of two chemicals or conditions to produce a reaction which has an effect greater than the sum of the two chemicals or conditions individually
Synergism
Layer with highest concentration of O3
Stratosphere
A condition set in which all people, at all times have physical and economic access to sufficient, safe and nutritious food to meet their dietary needs.
Food security
One limitation of hillside farming
Erosion, difficulty in mechanization, irrigation
Oil and gas are formed from _______ while coal is formed from _______ in anaerobic environments
Aquatic plants and animals, on land from trees and plants
Name two primary air pollutants
CO, CO2, NOX, SOX, SPM, VOCs
Convention for the protection and development of the Marine environment of the wider Caribbean
Cartagena Convention
Three principles of sustainability
Environmental, social, economic
Two impacts of land take on the environment
Deforestation, increased erosion, increased sedimentation, habitats destruction, loss of biodiversity
If a light bulb with an input of 70J produces 20 J of light energy and 50 J of heat what is the efficiency
28.57%
Give one pathway linkage
Pesticide>water>aquatic species
Free marks +1
Yay
The combination of several methods to prevent and manage pest problems
IPM
Two advantages of organic farming
Cheaper, slow-releasing, soil structure, environmentally friendly
The simultaneous production, and subsequent use, of heat as well as the electricity from thermal power plants
Cogeneration or combined heat and power
Free Mark +1
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How is BOD related to DO
High BOD=Low DO