Eutrophication of Lakes and Rivers

Question 1

Why are lakes and rivers highly vulnerable to pollution

Answer 1

lakes and rivers are less effective at diluting pollutants

Question 2

weakening the contents of pollutants to the presence of water

Answer 2

Dilution

Question 3

When lakes and rivers have large concentration of plant nutrients such as phosphates and nitrates

Answer 3

Eutrophication process

Question 4

contain phosphates and nitrates

Answer 4

fertilizers

Question 5

element needed for plant growth

Answer 5

phosphorus and nitrogen

Question 6

oxygen consuming bacteria

Answer 6

aerobic bacteria

Question 7

non oxygen consuming bacteria

Answer 7

anaerobic bacteria

Question 8

photosynthetic organisms

Answer 8

algae

Question 9

any chemical than an organism must ingest in order to live, grow, or reproduce

Answer 9

nutrient

Question 10

fertilizers are usually sold with ____ ratio

Answer 10

nitrogen - phosphorus - potassium ( N - P - K )

Question 11

any unwanted materials from municipal and industrial areas

Answer 11

solid wastes

Question 12

precipitation in urban areas that does not evaporate

Answer 12

stormwater

Question 13

can release waterborne and airborne toxins, occuring on oxygen-depleted zones (dead zones)

Answer 13

Harmful Algal Blooms (HAB)

Question 14

runoff of sewage and agriculture wastes introduces large quantities of plant nutrients to lakes/rivers

Answer 14

Algal Bloom

Question 15

Red tide - water that appears red due to (HAB) containing ___?

Answer 15

Dinoflagellates

Question 16

Plant nutrient that amplifies algal blooms

Answer 16

phosphate salts

Question 17

2 Factors why lakes and rivers are less effective at diluting pollutants

Answer 17

1. Stratified layers
2. Low flow rates or no flow at all

Question 18

group of compounds or substances crucial for plant survival

Answer 18

nutrients

Question 19

Process of Eutrophication

Answer 19

1. excessive nutrient input
2. overproduction of algae
3. algal bloom blocks sunlights
4. loss of nutrients and death of algae
5. decomposition by aerobic bacteria
6. anoxic environment
7. anaerobic bacteria causing toxic gaseous products

Question 20

flushing can take how many years?

Answer 20

1 - 100 years