human activities that impact climate change

Question 1

what are the four main effects of human activities on the carbon cycle?

Answer 1

deforestation
climate change
global warming
ocean warming

Question 2

what does deforestation increase into the atmosphere?

Answer 2

carbon dioxide content

Question 3

why does deforestation led to a decrease in the uptake of carbon dioxide?

Answer 3

removal of trees
less photosynthesis

Question 4

what do plants store carbon as?

Answer 4

biomass

Question 5

what does burning the wood parts of trees release?

Answer 5

carbon dioxide into atmosphere
carbon stored as biomass

Question 6

what are forests replaced by?

Answer 6

crops

Question 7

do crops store less or more carbon dioxide?

Answer 7

less carbon dioxide

Question 8

what happens when crops die?

Answer 8

decomposers undertake decay
releases carbon dioxide

Question 9

how do cattle lead to high levels of carbon dioxide?

Answer 9

replace forests
produce high levels of carbon dioxide
other greenhouse gases –> methane

Question 10

how have human activities contributed to climate change?

Answer 10

changes in global and regional climate patterns
more noticeably in 2nd half of 20th century

Question 11

what is considered to be the cause of climate change?

Answer 11

huge rise in atmospheric carbon dioxide level
rise in other greenhouse gases e.g. methane, nitrous oxides and water vapour

Question 12

what are the two main reasons for the rise in carbon dioxide levels?

Answer 12

combustion –> burning of fossil fuels, releasing carbon dioxide that was previously locked up
deforestation

Question 13

why is carbon dioxide considered an important greenhouse gas?

Answer 13

absorbs radiation from the earth

Question 14

what happens when carbon dioxide accumulates in excess?

Answer 14

leads to global warming

Question 15

what has global warming resulted in?

Answer 15

increased frequency of extreme weather conditions
polar ice caps melting
increased frequency of forest fires

Question 16

how can global warming lead to a change in species distribution?

Answer 16

plants and animals may be driven to extinction
due to not finding a suitable habitat fast enough
reduces biodiversity

Question 17

what would be a consequence of an increase in crop yield due to global warming?

Answer 17

pest populations may increase

Question 18

what can an increase in the oceans storing heat lead to?

Answer 18

time lag
between warming of atmosphere –> links to global atmospheric carbon dioxide levels
and warming of oceans

Question 19

what are the consequences of global warming and climate change on aquatic habitats?

Answer 19

fish migrating to cooler waters
less oygen dissolved in waters at higher temps
reduced productivity on fish farming industry
decreased pH (acidification) of oceans –> corals die, damages mollusc shells
increased rates of photosynthesis in aquatic habitats causing algal blooms

Question 20

what industry is particularly vulnerable to the impacts of climate change?

Answer 20

agriculture

Question 21

how can climate change affect agriculture?

Answer 21

changes in temperature
timing and quantity of rain –> more floods in UK
droughts and floods more frequent

Question 22

how can an increase in global warming affect fresh water?

Answer 22

will become critical to sustain food production and feed growing human population