Flashcards on Topic Test Science

question

What is likely to happen to the ecosystem pictured below after a period of time?
answer

The ecosystem will undergo primary succession followed by secondary succession.
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Succession is always caused by natural events.
answer

False
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Which of the following is not a characteristic of a climax community?
answer

experiences no change
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Which of the following could be both a natural and a human cause of succession?
answer

fire
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How are primary and secondary succession similar?
answer

Both primary and secondary succession involve ecosystems recovering from a disruptive event.
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Succession is affected by _______.
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all of the above
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Human impact on ecosystems would most likely lead to secondary succession over primary succession.
answer

True
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Which of the following is an example of a pioneer species?
answer

fungus
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How could climate change affect the ecosystems of the island nation of Samoa?
answer

a and b
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Pollution is the only way that humans can cause changes to ecosystems.
answer

False
question

Fish populations and other aquatic resources are likely to be affected by changes in what aquatic factors?
answer

all of the above
question

Which of the following could cause a habitat change?
answer

all of the above
question

What effect can fertilizer runoff have on an aquatic ecosystem?
answer

increased plant growth leading to a decrease in fish populations
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Ecosystems have trouble adjusting to short-term changes.
answer

False
question

Succession occurs when environmental factors affecting an ecosystem change.
answer

True
question

Climate warming trends allow plant and insect species to inhabit larger ranges.
answer

True
question

Why are there different theories about the effects of global warming?
answer

Global climate is complex, so changes in global climate are hard to predict.
question

Changes to the global climate could include _______.
answer

all of the above
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Local environmental changes have no effect on the global climate.
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False
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Scientists disagree about the possible effects of global warming.
answer

True
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Some scientists believe that global warming will lead to an increase in disease and starvation.
answer

True
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Which of the following is not a current theory regarding global climate change?
answer

Higher levels of carbon dioxide in the atmosphere will have no effect.
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The scientific explanation for global warming is very dependent on the _______ atom.
answer

carbon
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It is not possible for global warming to have any positive side effects.
answer

False
question

\”In a 2009 study, presented by the National Academy of Science, 97% of climate scientists agree that human activity is causing global warming.\” Which of the following statements is best supported by this study?
answer

Most climate scientists believe that there is evidence that explains global warming.
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Global warming is a theory accepted by a majority of scientists.
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True
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Which of the following is not a manmade cause of global warming?
answer

respiration
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In which major weather events of the 20th century did climate play a significant role?
answer

Dust Bowl
question

Human activities _______.
answer

exacerbate the natural greenhouse effect
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Greenhouse gases are best described as _______.
answer

gases that trap energy from the sun in Earth’s atmosphere
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Which of the following best describes the impact of glaciers upon the surface of the earth?
answer

Glaciers scraped across the surface and altered landscapes and the course of rivers.
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Which of the following best explains why air pollution that was once blamed for global cooling is now considered responsible for global warming?
answer

Scientists mistakenly thought pollution reflected sunlight and heat rather than absorbed it.
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Africa was covered by glaciers during the Pleistocene ice age.
answer

False
question

Which of the following is not a theory supporting global warming?
answer

Carbon dioxide is an insignificant greenhouse gas.
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Which of the following does not lead to an increase in phytoplankton reproduction?
answer

increased oxygen levels
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Which of the following is a negative effect of algal blooms on the environment?
answer

consumption of water’s oxygen
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Which of the following is not a way in which humans directly impact algal bloom production?
answer

fishing
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How does climate change lead to an increase in algal blooms?
answer

Increased levels of carbon dioxide, a greenhouse gas, leads to increased phytoplankton growth.
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Which of the following theories concerning global climate change is the most widely accepted?
answer

Global climate is changing due to burning of fossil fuels and deforestation.
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Which of the following would not cause habitat change?
answer

none of the above
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Succession occurs because _______.
answer

organisms gradually change the environment
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Which of the following statements about secondary succession is true?
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Secondary succession affects ecosystems that are already established.
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Which of the following predictions about global climate change is directly related to an increase in the burning of fossil fuels?
answer

global warming
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Which of the following is not a consequence of the onset of early spring events?
answer

acidic ocean water
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Rising sea levels are a possible global consequence to a change in local environments.
answer

True
question

Succession allows ecosystems to _______.
answer

all of the above
question

Manmade global warming is caused by _______.
answer

pollution
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Natural disasters can have positive effects on an ecosystem.
answer

True
question

Primary succession ________.
answer

occurs in areas without soil
question

Which of the following is an example of a long-term change to ecosystems?
answer

evolution

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