Water & Soil Management

Question 1

Where is most of earth’s water?

Answer 1

97% is in the oceans

Question 2

Largest freshwater reservoirs

Answer 2

1. Polar Icecaps
2. Groundwater

Question 3

Pros about Dams

Answer 3

• Emission-free power
• Deal with problem of variable water
  supply

Question 4

Cons about Dams

Answer 4

• Rivers dry up
• Reduce nutrients available below dam
• Change water temperature
• Stop the fish

Question 5

Wetland Biodiversity

Answer 5

• Wetlands thrive on flooding! Stopping
  flooding hurts the wetlands
• Critical in arid environments where
  wetlands support most biodiversity

Question 6

Soil erosion

Answer 6

Human activities accelerate soil erosion
○ Removing water, lowering the water table
○ Deforestation

Question 7

Irrigation

Answer 7

Irrigation can waterlog soil and lead to
soil salinization

Question 8

Defining water rights

Answer 8

Some see water as a commodity that
should be managed like any other
natural resources

Question 9

Desalination

Answer 9

Turning salt water into
fresh water

Question 10

Distillation

Answer 10

Desalination through
evaporation

Question 11

Reverse osmosis

Answer 11

Push salt-water
through a membrane, removing salt

Question 12

Genetically modified organism (GMOS)

Answer 12

One or
more new gene is introduced into the
genetic makeup of a crop

Question 13

Transgenic organism

Answer 13

Introduced genes
come from other species

Question 14

Benefits from GMOs

Answer 14

• Drought tolerance
• Better nutritional value
• Reducing needs for pesticides and
  herbicides reduces human and ecosystem deaths