Chap. 3 Food

Question 0

What can food security be limited by?

Answer 0

Population growth, environmental degradation, climate change

Question 1

Food security

Answer 1

When all people at all times have access to sufficient, safe nutritious food to a healthy and active lifestyle

Question 2

Environmental degradation

Answer 2

Agriculture land may become overworked, removes topsoil and reduce productivity of the land

Question 3

Hunger

Answer 3

Is typically the result of an inability to access food

Question 4

Domestication

Answer 4

Partly drove productive agriculture systems

• plants : saving and replanting seeds
• animals: keeping seperate from wild pop.

Question 5

Green revolution

Answer 5

Hybrid seeds, fertilizers, pesticides, new machinery , monocultures
Pros :
Increased crop yields,food surplus
Cons: soul erosion, depleted water sources, exposure to toxic Chem

Question 6

Genetically modified organisms

Answer 6

GMO’s
Insertion of genes from one organism to another produce altered genetic material
Bt gene in corn. Acts a pesticide
Issues: Bugs and other species over time become resistant to the Bt gene
Can contaminate other non Bt crops
Potential for health and allergen issues

Question 7

Tillage/tilling the soil

Answer 7

One of the first steps of growing a crop
-can make it easier for plant roots to dig into ground as they grow
- can incorporate left over plant matter from previous harvests - returns nutrients to soil
- can interfere with weed growth
Cons:
- rob soil of vital nutrients ex. Carbon, nitrogen
- can result in souls erosion

Question 8

Soil erosion

Answer 8

When tilled, nutrient rich topsoil is broken up into smaller particles that can be carried away by wind or water

Question 9

Aquifers

Answer 9

Areas of porous rock below ground were water collects

Question 10

Why is the rainforest shrinking?

Answer 10

Getting Cut and burned down to create pasture lands for cattle

Question 11

Three main crops

Answer 11

Wheat corn and rice

Question 12

Malnutrition

Answer 12

Is the result of poor nutrition
Can result from insufficient, excessive of unbalanced diet or inability to absorb foods
- excess of nutrients that causes bodily harm

Question 13

Food security results when all three of what conditions at satisfied

Answer 13

1. Food is avaliable
2. All people have acess to it
3. Food can fulfill nutritional needs

Question 14

Poverty

Answer 14

-unable to afford

Factors

• landownership
• use of agriculture land

Question 15

Farmland grab

Answer 15

Wealthier countries seek land outside their borders in order to produce food for their citizens

• buy land for low prices
• best farmland
• bought in poor countries

Question 16

Agriculture land use

Answer 16

Land may be changed from food (rice) to non-productive uses like tobacco

• shifts in production
• pressure form international lending organization

Question 17

Geographic constraints

Answer 17

Drought
Poor soil
Ex

Question 18

Unsustainable farming practices

Answer 18

Soils once fertile now depleted

Question 19

Energy prices

Answer 19

Cost of food
Time cost

Oil influences food prices

Question 20

Cost of food

Answer 20

Depend on 
Availability of water
Price of equipment
Cost of pesticides
oil price - transport. Growing. Processing.

Question 21

Sustainable farming practices

Answer 21

Persevere topsoil - reduced plowing , crop rotation

Incorporeal ing nitrogen fixing legumes and trees

Question 22

Hydroponics

Answer 22

Technique used to grow plants using nutrient rich water (instead of soil)

Question 23

Aqua phonics

Answer 23

Combine hydroponics With fish farming
Incorporating solid waste from fishes info the waters nutrients

-sustainable : waste into resource