Question
Which gas is the main contributor to the greenhouse effect?
A. Ozone
B. Methane
C. Nitrogen oxide
D. Water vapour
▶️Answer/Explanation
Ans. D
Question
Which activity directly contributes the most to recent increases in atmospheric CO2 concentrations?
A. Landfills
B. Planting trees
C. Cattle rearing
D. Burning of fossil fuels
▶️Answer/Explanation
Ans:D
Question
Which activity directly contributes the most to recent increases in atmospheric CO2 concentrations?
A. Landfills
B. Planting trees
C. Cattle rearing
D. Burning of fossil fuels
Answer/Explanation
Ans: D
Question
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.
Answer/Explanation
Ans: C
Question
The table shows features of greenhouse gases in the atmosphere.
According to the data in the table, which greenhouse gas contributes the most to climate change?
A. Carbon dioxide because it is the most abundant greenhouse gas
B. Methane because it has the shortest lifespan
C. Nitrous oxides because they absorb the greatest amount of shortwave radiation
D. CFCs because they destroy the ozone layer
▶️Answer/Explanation
A