ch 14 human population and pollution

Question 1

what are the causes of the population explosion

Answer 1

• no natural predators
  -better living conditions due to improved healthcare
  -improved disease prevention and hygene
  -growing food

Question 2

what were the factors keeping population undercontrol

Answer 2

-predators
-waste buildup
-lack of space
-disease
-lack of food

Question 3

what happened when manufacturing rates were increased

Answer 3

more industrial waste was produced which led to a release in chemicals that polluted water

Question 4

more raw materials demand =

Answer 4

more quarries -> more habitats distroyed

Question 5

more energy needed=

Answer 5

more fossil fuels burnt which increased co2 emissions

Question 6

what is meant by bioaccumilation

Answer 6

accumilation of pestacide doses

Question 7

what are fertalisers made of (NPK)

Answer 7

NITROGEN
PHOSPHORUS
POTASSIUM

Question 8

what is eutrophication

Answer 8

the process in which the water body becomes overly enriched with nutrients, leading to an increase in the production of algae

Question 9

how does eutrophication occur

Answer 9

fertalisers go into water
algea bloom
algea covers the surface of the water
too much competition for sunlight
plans at bottom of lake die
decomposers feed on dead plants
decomposers respire which takes up oxygen
lake becomes suffocated
all organisms die

Question 10

what are the 2 chemicals that cause airpollution

Answer 10

-sulfer dioxide
-nitrogen oxide

Question 11

what chemicals do burnt fossil fuels release

Answer 11

carbon dioxide and sulfer oxide which react to form sulfer dioxide

Question 12

what happens when theres a high concentration of nitrogen oxide and sulfer dioxide

Answer 12

breathing problems occur

Question 13

how is acid rain formed

Answer 13

when sulfer dioxide and nitrogen oxide dissolve in rain water

Question 14

whatre the effects of acid rain

Answer 14

it falls onto trees which kills microrganisms then dissolves into soil and makes the water acidic

Question 15

what is global dimming and what are its effects

Answer 15

when there are lots of solid particles in the air that reflect sunlight, this results in less light hitting earth and cooler tempteratures

Question 16

what is smog

Answer 16

a haze of small particles that can be seen in the air

Question 17

what are the reasons for deforestation

Answer 17

land is used to grow crops that can also be used for biofuels

Question 18

what are the downsides of deforestation

Answer 18

-increased co2 emissions from combusion and decomposers attacking dead trees
-reduces co2 removal

Question 19

how does deforestation effect biodiversity

Answer 19

it decreases biodiversity

Question 20

what are the 2 greenhouse gasses

Answer 20

carbon dioxide and methane

Question 21

what are the 2 ways methane is released

Answer 21

-when deforested and damp land is used to make rice,methane is released
-cattle released methane gas

Question 22

whats wrong with peat bog distruction

Answer 22

the plant is a massive carbon store so when its burned co2 emissions increase massively

Question 23

what is the greenhouse effect

Answer 23

usually co2 and methane absorb energy transfer from the sun and keep eath at a leveled temperature

Question 24

what happens when greenhouse gasses increase

Answer 24

they trap the energy from sun and cause climate to increase

Question 25

what are the effects of global warming

Answer 25

-climate change which causes unpredictable weather
-rising sea levels due to glacers melting
-changes in distrubution of animals
-reduced biodiversity due to conditions of climate change

Question 26

what 3 factors must be evaluated before conclusion

Answer 26

-validity
-reproductability
-repeatability