Environmental science semester 1

Question 1

What is the definition of sustainable development

Answer 1

Development that meets the needs of the present without compromising the ability of future generations to meet their own needs

Question 2

5 most harmful emission sources

Answer 2

industry, energy production, agriculture, households and transport

Question 3

4 compartments of pollution

Answer 3

water, air, soil and ecology

Question 4

3 most important effects of pollution

Answer 4

global warming, human health and biodiversity loss

Question 5

4 solutions for pollutants

Answer 5

remediation, process changes, sustainable solutions and policies

Question 6

definition of remediation

Answer 6

end of pipe (treatment to clean)

Question 7

definition of process changes

Answer 7

front of pipe (source reduction or re-use)

Question 8

natural attenuation

Answer 8

controlled disposal of the pollutant

Question 9

isolation of the pollutant

Answer 9

with the help of sheet piling it is possible to isolate the pollutant

Question 10

reactive barriers

Answer 10

with the use iron particles pollutants will bind

Question 11

pump and treat

Answer 11

the pollutant will be pumped to land and treated with chemicals, micro-organisms or heat

Question 12

inject and treat

Answer 12

with help of chemicals, micro-organisms and heat the pollutant will be dissolved

Question 13

definition of salnization

Answer 13

the salt concentration in soil increases

Question 14

4 different water erosion preventions

Answer 14

structural, vegetative, agronomic and management

Question 15

water cycle

Answer 15

precipitation, evaporation, condensation, run-off and infiltration

Question 16

biggest solution for water use

Answer 16

re-use of water

Question 17

effects of sediment

Answer 17

reduces light penetration, bringing pollutants into water

Question 18

eutrophication

Answer 18

Nitrogen and phosphorus increase the phytoplankton growth which causes the algae to bloom and decay. Bacteria use O2 to clean the dead algae which cause O2 shortage

Question 19

definition of the greenhouse effect

Answer 19

gases in the earth’s atmosphere trap the Sun’s heat

Question 20

definition of work

Answer 20

an activity involving a force in joules

Question 21

definition of energy

Answer 21

the capacity to do work in joules

Question 22

definition of power

Answer 22

rate of using energy in watts

Question 23

thermodynamics 1st law

Answer 23

the total amount of energy does not change

Question 24

thermodynamics 2nd law

Answer 24

after each energy transfer, less energy is available

Question 25

three sustainable energy sources

Answer 25

solar, biomass and nature’s forces