Gr 8 Natural Sciences Ch 1.2: Balance in an ecosystem
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Questions and Answers

What is the primary reason an ecosystem can only support a limited number of organisms?

  • Because of the limited number of species that can coexist
  • Due to the limited availability of resources in the ecosystem (correct)
  • Because of the complex social structures of the organisms
  • Due to the influence of external factors such as climate change

    • What happens to secondary and tertiary consumers when primary producers die in an ecosystem?

  • They face starvation and population decline (correct)
  • Their populations remain unaffected by the loss of primary producers
  • They migrate to other ecosystems in search of food
  • Their populations increase due to the availability of food

    • Which term describes a species that no longer exists?

  • Extinct (correct)
  • Resource
  • Endangered
  • Limit

    • What is the term for the maximum capacity of resources in an ecosystem to support the organisms living there?

    <p>Limit</p> Signup and view all the answers

    What is the primary resource that herbivores like zebras and elephants depend on in a savanna ecosystem?

    <p>Grass and trees</p> Signup and view all the answers

    What is the term for organisms that feed on plants in an ecosystem?

    <p>Primary Consumers</p> Signup and view all the answers

    What are the factors that influence population growth in an ecosystem?

    <p>Birth rates, death rates, immigration, and emigration</p> Signup and view all the answers

    What is the term for a species at risk of extinction due to a significant decline in its population or habitat?

    <p>Endangered</p> Signup and view all the answers

    What can sudden and severe disruptions to ecosystems be caused by?

    <p>Events like floods, hurricanes, and droughts</p> Signup and view all the answers

    What is an example of a sudden climate change event leading to extinction?

    <p>The extinction of dinosaurs</p> Signup and view all the answers

    What can lead to shifts in population dynamics or even extinctions?

    <p>Long-term climate changes</p> Signup and view all the answers

    What is a major threat to the Riverine Rabbit's habitat?

    <p>Habitat destruction and agricultural expansion</p> Signup and view all the answers

    What is a way to conserve habitats and provide safe havens for endangered species?

    <p>Establishing protected areas</p> Signup and view all the answers

    What helps detect imbalances in ecosystems early and allows for timely interventions?

    <p>Continuous ecological monitoring</p> Signup and view all the answers

    What can outcompete native species for resources or introduce new diseases?

    <p>Invasive species</p> Signup and view all the answers

    What is essential to prevent the extinction of the Riverine Rabbit?

    <p>Conservation efforts</p> Signup and view all the answers

    What is the primary consequence of disrupting the balance in an ecosystem?

    <p>Significant consequences for all species involved.</p> Signup and view all the answers

    What is the role of primary producers in an ecosystem?

    <p>They provide food and shelter for other organisms.</p> Signup and view all the answers

    What is the primary cause of population fluctuations in an ecosystem?

    <p>Variations in birth and death rates.</p> Signup and view all the answers

    What is the term for the interconnectedness of organisms within an ecosystem?

    <p>Resource dependence.</p> Signup and view all the answers

    What is the primary consequence of a decline in primary producers in an ecosystem?

    <p>A decrease in secondary and tertiary consumers.</p> Signup and view all the answers

    What is the primary factor that influences the balance in an ecosystem?

    <p>The maximum capacity of resources.</p> Signup and view all the answers

    What is the primary characteristic of a balanced ecosystem?

    <p>Equilibrium between different trophic levels.</p> Signup and view all the answers

    What is the primary consequence of human-induced factors on ecosystem balance?

    <p>A disruption to the balance in the ecosystem.</p> Signup and view all the answers

    What can human activities such as deforestation, urbanization, and agriculture lead to?

    <p>Habitat fragmentation and destruction</p> Signup and view all the answers

    What is a consequence of long-term climate change on ecosystems?

    <p>Irreversible damage and habitat alterations</p> Signup and view all the answers

    What is a primary way to conserve habitats and preserve resources for future generations?

    <p>Implementing sustainable agricultural practices</p> Signup and view all the answers

    What is the main reason for the decline of the Riverine Rabbit population?

    <p>Habitat destruction and agricultural expansion</p> Signup and view all the answers

    What can pollutants in ecosystems do?

    <p>Poison organisms and disrupt reproductive systems</p> Signup and view all the answers

    What is a consequence of over-harvesting resources?

    <p>Depletion of populations faster than they can recover</p> Signup and view all the answers

    What can non-native species do to local ecosystems?

    <p>Outcompete native species for resources</p> Signup and view all the answers

    What is essential for maintaining ecosystem balance?

    <p>Conservation efforts and ecological monitoring</p> Signup and view all the answers

    What is the primary effect of habitat destruction on ecosystem balance?

    <p>It reduces the available resources for species and disrupts ecosystem balance</p> Signup and view all the answers

    Which of the following is NOT a consequence of pollution in ecosystems?

    <p>Increase in population growth</p> Signup and view all the answers

    What is the primary goal of ecological monitoring?

    <p>To detect imbalances early and allow for timely interventions</p> Signup and view all the answers

    What is a consequence of overexploitation of resources?

    <p>Populations are depleted faster than they can recover</p> Signup and view all the answers

    What is a characteristic of a species that is critically endangered?

    <p>It has fewer than 200 individuals left</p> Signup and view all the answers

    What is the primary consequence of climate change on ecosystems?

    <p>It alters habitats, making them unsuitable for certain species</p> Signup and view all the answers

    What is the primary role of sustainable practices in maintaining ecosystem balance?

    <p>To reduce the impact on ecosystems and preserve resources</p> Signup and view all the answers

    What is a consequence of introducing non-native species to an ecosystem?

    <p>It outcompetes native species for resources or introduces new diseases</p> Signup and view all the answers

    What is the primary reason why ecosystems can only support a limited number of organisms?

    <p>Due to the limited resources available</p> Signup and view all the answers

    What happens when primary producers are removed from an ecosystem?

    <p>Cascading effects occur through the trophic levels</p> Signup and view all the answers

    What is the term for the process by which birth rates, death rates, immigration, and emigration affect population growth?

    <p>Population Growth Dynamics</p> Signup and view all the answers

    What is the primary consequence of disrupting the balance in an ecosystem?

    <p>Shifts in population dynamics</p> Signup and view all the answers

    What is the primary role of primary producers in an ecosystem?

    <p>To provide food for herbivores</p> Signup and view all the answers

    What can human activities, such as deforestation and urbanization, lead to?

    <p>Population declines and extinctions</p> Signup and view all the answers

    What is essential to prevent the extinction of endangered species?

    <p>Preserving habitats and resources</p> Signup and view all the answers

    What is the primary characteristic of a balanced ecosystem?

    <p>Equilibrium between trophic levels and resources</p> Signup and view all the answers

    What is the primary consequence of a prolonged drought on an ecosystem?

    <p>A shift in population dynamics leading to extinctions</p> Signup and view all the answers

    What is the primary role of ecological monitoring in maintaining ecosystem balance?

    <p>To detect imbalances early and allow for timely interventions</p> Signup and view all the answers

    What is the primary consequence of habitat fragmentation on an ecosystem?

    <p>A disruption to the ecosystem balance</p> Signup and view all the answers

    What is the primary effect of climate change on an ecosystem?

    <p>A shift in population dynamics leading to extinctions</p> Signup and view all the answers

    What is the primary consequence of overexploitation of resources on an ecosystem?

    <p>A disruption to the ecosystem balance</p> Signup and view all the answers

    What is the primary role of sustainable practices in maintaining ecosystem balance?

    <p>To reduce the impact on ecosystems and preserve resources for future generations</p> Signup and view all the answers

    What is the primary consequence of pollution on an ecosystem?

    <p>A disruption to the ecosystem balance</p> Signup and view all the answers

    What is the primary goal of conservation efforts for the Riverine Rabbit?

    <p>To prevent its extinction and maintain ecosystem balance</p> Signup and view all the answers

    What is the primary mechanism by which ecosystem balance is maintained?

    <p>Regulation of population growth through birth and death rates</p> Signup and view all the answers

    What is the ultimate consequence of a decline in primary producers in an ecosystem?

    <p>Shift in population dynamics</p> Signup and view all the answers

    What is the primary factor that determines the carrying capacity of an ecosystem?

    <p>Availability of resources</p> Signup and view all the answers

    What is the primary consequence of resource dependence in ecosystems?

    <p>Cascading effects throughout the trophic levels</p> Signup and view all the answers

    What is the primary mechanism by which human activities affect ecosystem balance?

    <p>Through habitat destruction and resource exploitation</p> Signup and view all the answers

    What is the primary characteristic of a species that is critically endangered?

    <p>Significant decline in population or habitat</p> Signup and view all the answers

    What is the primary consequence of overexploitation of resources?

    <p>Depletion of resources</p> Signup and view all the answers

    What is the primary role of ecological monitoring in maintaining ecosystem balance?

    <p>To detect imbalances in ecosystems</p> Signup and view all the answers

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