Topic Test Science

The ecosystem will undergo primary succession followed by secondary succession.
What is likely to happen to the ecosystem pictured below after a period of time?
False
Succession is always caused by natural events.
experiences no change
Which of the following is not a characteristic of a climax community?
fire
Which of the following could be both a natural and a human cause of succession?
Both primary and secondary succession involve ecosystems recovering from a disruptive event.
How are primary and secondary succession similar?
all of the above
Succession is affected by _______.
True
Human impact on ecosystems would most likely lead to secondary succession over primary succession.
fungus
Which of the following is an example of a pioneer species?
a and b
How could climate change affect the ecosystems of the island nation of Samoa?
False
Pollution is the only way that humans can cause changes to ecosystems.
all of the above
Fish populations and other aquatic resources are likely to be affected by changes in what aquatic factors?
all of the above
Which of the following could cause a habitat change?
increased plant growth leading to a decrease in fish populations
What effect can fertilizer runoff have on an aquatic ecosystem?
False
Ecosystems have trouble adjusting to short-term changes.
True
Succession occurs when environmental factors affecting an ecosystem change.
True
Climate warming trends allow plant and insect species to inhabit larger ranges.
Global climate is complex, so changes in global climate are hard to predict.
Why are there different theories about the effects of global warming?
all of the above
Changes to the global climate could include _______.
False
Local environmental changes have no effect on the global climate.
True
Scientists disagree about the possible effects of global warming.
True
Some scientists believe that global warming will lead to an increase in disease and starvation.
Higher levels of carbon dioxide in the atmosphere will have no effect.
Which of the following is not a current theory regarding global climate change?
carbon
The scientific explanation for global warming is very dependent on the _______ atom.
False
It is not possible for global warming to have any positive side effects.
Most climate scientists believe that there is evidence that explains global warming.
“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?
True
Global warming is a theory accepted by a majority of scientists.
respiration
Which of the following is not a manmade cause of global warming?
Dust Bowl
In which major weather events of the 20th century did climate play a significant role?
exacerbate the natural greenhouse effect
Human activities _______.
gases that trap energy from the sun in Earth’s atmosphere
Greenhouse gases are best described as _______.
Glaciers scraped across the surface and altered landscapes and the course of rivers.
Which of the following best describes the impact of glaciers upon the surface of the earth?
Scientists mistakenly thought pollution reflected sunlight and heat rather than absorbed it.
Which of the following best explains why air pollution that was once blamed for global cooling is now considered responsible for global warming?
False
Africa was covered by glaciers during the Pleistocene ice age.
Carbon dioxide is an insignificant greenhouse gas.
Which of the following is not a theory supporting global warming?
increased oxygen levels
Which of the following does not lead to an increase in phytoplankton reproduction?
consumption of water’s oxygen
Which of the following is a negative effect of algal blooms on the environment?
fishing
Which of the following is not a way in which humans directly impact algal bloom production?
Increased levels of carbon dioxide, a greenhouse gas, leads to increased phytoplankton growth.
How does climate change lead to an increase in algal blooms?
Global climate is changing due to burning of fossil fuels and deforestation.
Which of the following theories concerning global climate change is the most widely accepted?
none of the above
Which of the following would not cause habitat change?
organisms gradually change the environment
Succession occurs because _______.
Secondary succession affects ecosystems that are already established.
Which of the following statements about secondary succession is true?
global warming
Which of the following predictions about global climate change is directly related to an increase in the burning of fossil fuels?
acidic ocean water
Which of the following is not a consequence of the onset of early spring events?
True
Rising sea levels are a possible global consequence to a change in local environments.
all of the above
Succession allows ecosystems to _______.
pollution
Manmade global warming is caused by _______.
True
Natural disasters can have positive effects on an ecosystem.
occurs in areas without soil
Primary succession ________.
evolution
Which of the following is an example of a long-term change to ecosystems?

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