Practise IB Biology HL D4.3 with climate data questions on greenhouse forcing, feedback, ocean acidification, habitat shifts, phenology and carbon sequestration.
91 questions in this syllabus scope, with question parts counted together.
117 papers analysed · Tagging incomplete
What is the main driver of contemporary climate change?
The burning of fossil fuels, releasing greenhouse gases into the atmosphere
Natural variability in solar radiation, causing periodic shifts in temperature
Ocean currents regulating heat distribution, influencing weather patterns
Volcanic eruptions heating the atmosphere
Which expected effect of temperature increase on arctic ecosystems will increase carbon dioxide in the atmosphere?
Greater production of plants due to warmer temperatures and changing vegetation
Greater decomposition of organic matter currently stored in permafrost
Less ice and snow will cause incoming radiation to be absorbed more readily
Melting ice from glaciers and icebergs will cause sea levels to rise
Boreal forests stretch across Canada, Russia and Scandinavia. This northern ecosystem accounts for 29 % of the world's forest areas. The long, cold winters favour tall evergreen trees with either needles or scale-like leaves. These trees are wind-pollinated and their seeds are not enclosed in a fruit. The photograph shows a typical boreal forest in winter.
An increase in global temperatures poses a critical threat to boreal forests. Explain the consequences of climate change to this northern ecosystem.
The greenhouse effect is a naturally occurring process.
The enhanced greenhouse effect can cause a rise in atmospheric temperature.
Outline two consequences of a global temperature rise on arctic ecosystems.
1.
2.
What is a potential consequence of the rise in global temperatures?
Increased exposure to UV light due to ozone depletion
Increase in ocean pH threatening the survival of marine organisms that require calcium carbonate
Decrease in the number and severity of storms due to the increased evaporation
Changes to circulating ocean currents
Aedes japonicus and Aedes albopictus are invasive mosquito species that have recently become established in Western Europe. A. japonicus is more suited to the cooler regions in central Europe, while A. albopictus is adapted to warmer temperatures of the Mediterranean regions.
A. japonicus
A. albopictus
Suggest a possible impact of increasing mean temperatures in Europe on the distribution of A. albopictus.
The oceans absorb much of the carbon dioxide in the atmosphere. The combustion of fossil fuels has increased carbon dioxide ocean concentrations. What adverse effect does this have on marine life?
Heterotrophs consume more phytoplankton.
Phytoplankton have increased rates of photosynthesis.
Corals deposit less calcium carbonate to form skeletons.
Increased pH reduces enzyme activity in marine organisms.
Which of the following could be a subject of phenological research?
Timing of budburst in a tree species each year
Changes in allele frequencies in a population over time
The relationship between changes in ocean acidification and carbon dioxide concentration
The emergence of a new species of migratory bird by divergent evolution
No public sample questions are available for this syllabus point yet.
Boreal forests stretch across Canada, Russia and Scandinavia. This northern ecosystem accounts for 29 % of the world's forest areas. The long, cold winters favour tall evergreen trees with either needles or scale-like leaves. These trees are wind-pollinated and their seeds are not enclosed in a fruit. The photograph shows a typical boreal forest in winter.
In some areas there are gaps in the boreal forest where trees fail to grow and peat tends to accumulate. Suggest reasons for this.
An increase in global temperatures poses a critical threat to boreal forests. Explain the consequences of climate change to this northern ecosystem.
