11 Questions
What percentage of the land surface has been transformed by human action?
Between one-third and one-half
What is the increase in atmospheric carbon dioxide concentration since the Industrial Revolution?
30%
What was the main objective of the Biosphere 2 experiment?
Both b and c
What happened to the oxygen levels inside Biosphere 2?
They decreased by 0.5% per month
What other issues were observed inside Biosphere 2?
All of the above
What is the 'pessimistic conclusion' drawn from the Biosphere 2 experiment?
Earth is a closed system too, a larger version of Biosphere 2
What is the main characteristic of a closed system, as described in the text?
Only energy is naturally transferred outside the atmosphere, and no mass enters or exits the earth.
What was one of the key lessons learned from the Biosphere 2 experiment, according to the text?
Ecology can be a science, as it allowed researchers to experiment on complex natural systems.
What was one of the challenges faced in the Biosphere 2 experiment, as mentioned in the text?
The team had to spend hours every day pulling down the overgrowth of morning glories in the rain forest.
What was one of the key lessons learned about waste management in the Biosphere 2 experiment?
Waste can be effectively recycled in a closed system.
What was one of the key lessons learned about human health in the Biosphere 2 experiment?
Humans can only survive on a calorie-restricted diet in a closed system.
Test your knowledge on key facts about human impact on Earth, including land transformation, carbon dioxide concentration, the Industrial Revolution, fresh water usage, and nitrogen fixation.
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