Natural Systems Under Stress - Plan B 3.0 Chapter 5

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    What small country of 2 million people is embedded within South Africa?(pg 86 - spelling counts!)

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About This Quiz


A quiz over chapter 5 from Plan B 3.0 by Lester Brown. This is a homework assignment for AP Environmental Science at Paschal High School. It must be completed by Sunday November 28th at 10pm.

Natural Systems Under Stress - Plan B 3.0 Chapter 5 - Quiz

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  • 2. 

    At the biginning of the twentieth century, the eath's forested area was estimated at 5 billion hectares. since then it has shrunk to just under ___ billion hectares.

    Explanation
    The correct answer is 4. The question states that at the beginning of the twentieth century, the earth's forested area was estimated at 5 billion hectares. Since then, it has shrunk to just under 4 billion hectares. This means that the forested area has decreased by approximately 1 billion hectares, which is reflected in the answer choices.

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  • 3. 

    How many acres are in a hectare?

    Explanation
    There are different ways to convert hectares to acres, depending on the specific conversion factor used. The correct answer options include all possible conversion factors: 2.5, 2.471, 2.47, and 2.4. Each of these values represents a different conversion factor that can be used to calculate the number of acres in a hectare.

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  • 4. 

    _______________________ - land that is too dry, too steeply sloping, or not fertile enough to sustain crop production. (Spell correctly!)(found in section: From Grassland to Desert)

    Explanation
    Rangeland refers to land that is unsuitable for crop production due to being too dry, too steep, or lacking fertility. It is an area of land that is used for grazing livestock and wildlife. Rangelands can be found in various regions and are important for sustaining grazing activities and maintaining biodiversity.

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  • 5. 

    Who is the head of Iran's Anti-Desertification Organization? (Spelling counts!)

    Explanation
    The head of Iran's Anti-Desertification Organization is Mohammad Jarian. This is indicated by the multiple variations of his name provided as answer options.

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  • 6. 

    The leatherback turtle, one of the most ancient animals, which can reach a weight of 360 kilograms (which is how many pounds???) has dropped in population from 115,000 in 1982 to ___________ in 1996

    Explanation
    The correct answer for the missing population number of leatherback turtles in 1996 is 34,500. This is the numerical representation of "thirty four thousand and five hundred." The sentence indicates that the leatherback turtle population decreased from 115,000 in 1982 to 34,500 in 1996.

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  • 7. 

    The ________________ is a Europe-sized savanna-like region south of the Amazon basin.

    Explanation
    The cerrado, also known as Cerrado, is a savanna-like region located south of the Amazon basin. It is comparable in size to Europe and is characterized by a diverse range of vegetation, including grasslands, shrubs, and small trees. The cerrado is an important ecological hotspot, home to a wide variety of plant and animal species, many of which are endemic to the region.

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  • 8. 

    In 2006 the US experienced a major decline in its principal pollinator - which is a type of

    • Bird

    • Bat

    • Beetle

    • Deer

    • Bee

    Correct Answer
    A. Bee
    Explanation
    In 2006, the US experienced a major decline in its principal pollinator, which is the bee. Bees play a crucial role in pollination, transferring pollen from male to female flowers, which allows plants to reproduce. The decline of bees can have significant impacts on agriculture and ecosystems, as many plants rely on them for pollination. This decline could be attributed to various factors such as habitat loss, pesticide use, diseases, and climate change.

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  • 9. 

    Approximatley ____ percent of the coreal reefs in the Caribbean ocean are threatened by pollution from cruise ship discharges.

    • 15%

    • 10%

    • 5%

    • 2%

    • 33%

    Correct Answer
    A. 15%
    Explanation
    Approximately 15% of the coral reefs in the Caribbean ocean are threatened by pollution from cruise ship discharges. This means that a significant portion of the coral reefs in the region are at risk due to the pollution caused by the discharge of waste and other pollutants from cruise ships. This pollution can harm the fragile ecosystem of the coral reefs, leading to coral bleaching, loss of biodiversity, and overall degradation of the reefs. Efforts need to be made to reduce this pollution and protect the Caribbean coral reefs for future generations.

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  • 10. 

    In 2003 a landmark study by a Canadian-German research team pulbished in Nature (a highly respected journal) concluded that ______ opercent of the large fish in the oceans had disappeared over the last 50 years.

    • 50%

    • 25%

    • 75%

    • 33%

    • 90%

    Correct Answer
    A. 90%
    Explanation
    The correct answer is 90%. In 2003, a study published in Nature concluded that 90% of the large fish in the oceans had disappeared over the last 50 years. This study was conducted by a Canadian-German research team and is considered a landmark study due to its findings. The high percentage of fish depletion highlights the alarming decline in marine biodiversity and the need for conservation efforts to protect ocean ecosystems.

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  • 11. 

    How big is a hectare?

    • 10,000 square meters

    • 1,000 square meters

    • 100 square meters

    • 100,000 square meters

    Correct Answer
    A. 10,000 square meters
    Explanation
    A hectare is a unit of area commonly used in measuring land. It is equal to 10,000 square meters. This means that a hectare is a very large area, equivalent to 2.47 acres. It is often used in agriculture and land development to determine the size of fields, plots, or parcels of land.

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  • 12. 

    In the section (Advancing Deserts)Over the last half-century, some _______________ villages in northern and western China have been entirely or partly abandoned as a result of being overrun by drifting sand.

    • 1500

    • 500

    • 12000

    • 24000

    • 100,000

    Correct Answer
    A. 24000
  • 13. 

    Introduced or alien species are implicated in ___ percent of all the plants listings on the IUCN Red List.

    • 5%

    • 10%

    • 15%

    • 20%

    • 25%

    Correct Answer
    A. 5%
    Explanation
    Introduced or alien species are responsible for causing damage to ecosystems and native species. However, only a small percentage of all the plants listed on the IUCN Red List are affected by these introduced species. The correct answer, 5%, indicates that a relatively low number of plant species on the list are impacted by introduced or alien species.

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  • 14. 

    Why did Thailand announce a nationwide ban on tree cutting in 1989?

    • Due to a shortage of trees

    • Severe Flooding and heavy loss of life in landslides

    • Reduced crop harvest

    • Because of species loss

    Correct Answer
    A. Severe Flooding and heavy loss of life in landslides
    Explanation
    Thailand announced a nationwide ban on tree cutting in 1989 because severe flooding and heavy loss of life in landslides were occurring. Cutting down trees can lead to deforestation, which in turn increases the risk of flooding and landslides. By implementing the ban, Thailand aimed to protect its citizens and prevent further damage caused by these natural disasters.

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  • 15. 

    Mongolia imports ____  percent of their wheat

    • 20%

    • 40%

    • 60%

    • 80%

    Correct Answer
    A. 60%
    Explanation
    Mongolia imports 60% of their wheat. This means that out of the total amount of wheat consumed in Mongolia, 60% is imported from other countries. This suggests that Mongolia relies heavily on wheat imports to meet its domestic demand for this staple crop.

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