Vocabulary
land where it is possible to grow crops
arable land
Which requires less energy to produce? beef or wheat
wheat
Reasons for desertification
overgrazing, loss of soil fertility, erosion
One way to reduce seafood overharvesting is to increase _______ efforts.
aquaculture
rock broken down or decomposition, into small pieces
soil formation
Seeds are planted among the roots of the previous crop
no-till farming
True or False:
Vitamins are important in growth and development.
Carbohydrates are mainly used as energy.
Proteins are to build membranes and hormones.
True
True
False
caused by wind and rain to bare and exposed soil
erosion
Using ______ instead of groundwater on crops, will decrease salinization.
rainwater
prolonged period which no rain falls in a particular area
drought
chemicals that become concentrated in organisms high on the food chain
persistent pesticides
List 2 causes of famine.
Failure of food production to keep pace with population growth, crop failure due to drought, distribution due to political unrest
disadvantage of the green revolution
use of pesticides and fertilizers increase the risk of pollution
farming for local use only
subsistence farming
advantage of green revolution
new crop varieties
health problem caused by not eating enough necessary nutrients
malnutrition
Describe modern methods of agriculture.
machines, irrigating with drip systems, applying chemicals
accumulation of salts in soil
salinization
Soil-retaining terraces and contour plowing are examples of _____ ______.
soil conservation
upper layer of soil that contains rock, water, air, and organic matter
topsoil
widespread food shortage
famine
Name 2 of the most genetically modified crops used today.
corn, cotton, soybean, canola, papaya, sugar beets
any organism that occurs where it is not wanted or is in large numbers to cause economic damage
pest
direct manipulation of genes of desirable traits to be transferred from one organism to another
genetic engineering
Proteins are made of _____ _____, which are essential for good health.
amino acids