Biodiversity And Global Warming Question Preview (ID: 21371)

Affects Of GHGs And Global Warming.[print questions]

Methane has the same effect in the atmosphere as carbon dioxide. As more livestock are raised to provide food for humans, what is the most likely effect of the increase in methane?
a) acid rain
b) ozone thinning
c) water pollution
d) global warming

The average temperature of Earth has increased approximately 0.8°C in the last one hundred years. Which of the following do researchers most attribute to this temperature increase?
a) increased population in third­world countries
b) increased use of fossil fuels
c) the solar flares reaching Earth
d) the lower amounts of carbon dioxide

Paleoclimatologists study the climate and its changes throughout Earth’s history. What observation by paleoclimatologists led scientists to predict that the average temperature of the planet is rising due to the combustion of fossil fuels?
a) increases in average temperatures with increasing volcanic activity
b) direct correlation between atmospheric carbon dioxide level and global temperature
c) a recent rise in global temperature as atmospheric pollution increased
d) changes in sea level that correspond to average global temperature

What effect would a long­term rise in the average surface temperature have on the oceans?
a) Oceans would absorb the heat and hold temperatures lower.
b) Evaporation would decrease and produce clouds blocking the Sun.
c) Polar ice would melt and result in the levels of the ocean rising
d) More plant life would grow and help reduce the greenhouse effect.

Which of these is a threat to the survival of an ecosystem?
a) predator­ prey population cycles
b) less biomass at higher levels of the food web
c) a shrinking variety of animal and plant species
d) competition among some consumer populations

Global warming affects sea levels. Which of these is a likely consequence if the trend of global warming continues in coming decades?
a) Melting glaciers will cause flooding of coastal towns and cities.
b) Melting glaciers will cause flash flooding in mountainous regions.
c) Evaporation will cause the formation of fjords and U­shaped valleys.
d) Evaporation will cause sea levels to drop enlarging coastal areas.

Can we reduce or reverse the effects that burning fossil fuel has on atmospheric carbon by stopping deforestation?
a) no, stopping deforestation will not have any impact on reducing atmospheric carbon
b) yes, atmospheric carbon would be greatly reduced
c) It will first reduce the amount of atmospheric carbon, but then the levels would rise
d) atmospheric carbon would be reduced by half

Carbon is required for photosynthesis. Where does the required carbon come from?
a) the soil
b) the atmosphere
c) respiration
d) fossil fuels

The average global ocean temperature in 1912 was 15.8°C, and in 2011 this temperature was 16.5°C. Algae have an optimal growing range of 16°C to 27°C. What is the predicted impact of the change in average ocean temperature on algae?
a) It increases their territories
b) It eliminates their predators.
c) It removes their need for sunlight.
d) It narrows their ecological niche.

What are two natural phenomenon that can be attributed to global warming?
a) sunspots and ocean acidification
b) volcanoes and ocean acidification
c) ocean acidification and deforestation
d) sunspots and volcanoes

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