Gr 8 Natural Sciences Ch 1.2: Ecosystems
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Questions and Answers

What is the term for the non-living physical and chemical elements of an ecosystem?

  • Abiotic (correct)
  • Habitat
  • Biotic
  • Ecosystem

    • What is the seasonal movement of organisms from one habitat to another called?

  • Migration
  • Hibernation
  • Migrate (correct)
  • Predation

    • What is the term for the living components of an ecosystem?

  • Habitat
  • Ecosystem
  • Biotic (correct)
  • Abiotic

    • What is the natural environment where an organism resides?

    <p>Habitat (B)</p> Signup and view all the answers

    What is the process by which plants convert carbon dioxide and water into glucose and oxygen?

    <p>Photosynthesis (B)</p> Signup and view all the answers

    What is the general equation for photosynthesis?

    <p>Carbon Dioxide + Water → Glucose + Oxygen (C)</p> Signup and view all the answers

    What is the process by which plants and animals break down glucose molecules to release energy for cellular processes?

    <p>Respiration (B)</p> Signup and view all the answers

    What is the term for an organism that hunts and feeds on other organisms?

    <p>Predator (B)</p> Signup and view all the answers

    What is the by-product of the respiration process?

    <p>Carbon dioxide and water (C)</p> Signup and view all the answers

    What is the result of competition between species in an ecosystem?

    <p>The population sizes and distribution of the competing species are affected (C)</p> Signup and view all the answers

    What is an example of mutualism in an ecosystem?

    <p>Bees and flowers engaging in pollination (D)</p> Signup and view all the answers

    What is the primary purpose of studying ecosystems?

    <p>To understand the structure and function of ecosystems (C)</p> Signup and view all the answers

    What is an example of a predator-prey dynamic in an ecosystem?

    <p>Lions hunting zebras (B)</p> Signup and view all the answers

    What determines the boundaries of an ecosystem?

    <p>The interactions and processes that occur within the ecosystem (A)</p> Signup and view all the answers

    What is an example of an abiotic component in a pond ecosystem?

    <p>Water (C)</p> Signup and view all the answers

    What is the purpose of respiration in organisms?

    <p>To produce energy (B)</p> Signup and view all the answers

    What is an example of commensalism in an ecosystem?

    <p>Remora fish attaching themselves to sharks (B)</p> Signup and view all the answers

    What is the role of plants in the ecosystem?

    <p>To produce oxygen and food for other organisms (A)</p> Signup and view all the answers

    What is the collective functioning of all ecosystems on Earth known as?

    <p>Biosphere (D)</p> Signup and view all the answers

    What is the primary role of abiotic components in an ecosystem?

    <p>To regulate the balance and flow of energy and nutrients (A)</p> Signup and view all the answers

    Which of the following is a result of the interaction between biotic and abiotic components?

    <p>Maintaining the balance and flow of energy and nutrients (A)</p> Signup and view all the answers

    What is the by-product of photosynthesis that is essential for the respiration of most living organisms?

    <p>Oxygen (A)</p> Signup and view all the answers

    Which process involves the breakdown of glucose molecules to release energy for cellular processes?

    <p>Respiration (B)</p> Signup and view all the answers

    What is the primary function of biotic components in an ecosystem?

    <p>To cycle nutrients (B)</p> Signup and view all the answers

    What is the term for the specific physical space in which an ecosystem operates?

    <p>Ecosystem (C)</p> Signup and view all the answers

    Which of the following is an example of an interaction between biotic and abiotic components?

    <p>Plants responding to sunlight (D)</p> Signup and view all the answers

    What is the overall effect of respiration on the atmosphere?

    <p>It maintains a balance between oxygen and carbon dioxide (D)</p> Signup and view all the answers

    What is the primary reason for competition between species in an ecosystem?

    <p>To obtain a limited resource, such as food or water (C)</p> Signup and view all the answers

    What is the term for the interaction between a parasite and its host?

    <p>Parasitism (B)</p> Signup and view all the answers

    What is the role of biotic components in an ecosystem?

    <p>They interact with abiotic components to sustain life (C)</p> Signup and view all the answers

    How do ecologists study ecosystems?

    <p>By observing the interactions between biotic and abiotic components (D)</p> Signup and view all the answers

    What is the result of feeding relationships in ecosystems?

    <p>Maintaining ecological balance and controlling population sizes (B)</p> Signup and view all the answers

    What is the primary characteristic of an ecosystem's size?

    <p>Its boundaries are defined by the interactions and processes within it (A)</p> Signup and view all the answers

    What is the role of plants in the respiration process?

    <p>They consume carbon dioxide and oxygen (B)</p> Signup and view all the answers

    What is the purpose of studying the interactions between biotic and abiotic components in an ecosystem?

    <p>To understand the structure, function, and dynamics of ecosystems (B)</p> Signup and view all the answers

    What is an example of a symbiotic relationship in an ecosystem?

    <p>Bees and flowers engaging in mutualism (A)</p> Signup and view all the answers

    What is the purpose of respiration in an organism?

    <p>To release energy for cellular processes (B)</p> Signup and view all the answers

    What type of interaction occurs when two or more species compete for the same limited resource?

    <p>Competition (B)</p> Signup and view all the answers

    What is an example of a mutualistic relationship in an ecosystem?

    <p>Bees and flowers (D)</p> Signup and view all the answers

    What is the ultimate source of energy for almost all ecosystems?

    <p>Sunlight (B)</p> Signup and view all the answers

    What is the role of water in a pond ecosystem?

    <p>An abiotic component that provides habitat for aquatic plants (C)</p> Signup and view all the answers

    What is the result of the interaction between biotic and abiotic components in an ecosystem?

    <p>A balance in the ecosystem (C)</p> Signup and view all the answers

    What is an example of parasitism in an ecosystem?

    <p>Ticks and animals (D)</p> Signup and view all the answers

    What is the effect of respiration on the atmosphere?

    <p>An increase in carbon dioxide levels (D)</p> Signup and view all the answers

    What is the primary goal of studying ecosystems?

    <p>To understand the interactions between biotic and abiotic components (B)</p> Signup and view all the answers

    What determines the boundaries of an ecosystem?

    <p>The interactions and processes that occur within it (C)</p> Signup and view all the answers

    What is the primary function of an ecosystem?

    <p>To support the life of biotic components (D)</p> Signup and view all the answers

    What is the role of sunlight in the photosynthesis process?

    <p>It triggers the conversion of carbon dioxide and water into glucose and oxygen (B)</p> Signup and view all the answers

    What is the result of the interactions between biotic and abiotic components in an ecosystem?

    <p>A balance in the flow of energy and nutrients (A)</p> Signup and view all the answers

    What is the purpose of studying the biosphere?

    <p>To identify the collective functioning of all ecosystems on Earth (D)</p> Signup and view all the answers

    What is the process by which plants and animals release energy from glucose?

    <p>Respiration (C)</p> Signup and view all the answers

    What is the relationship between the biotic and abiotic components in an ecosystem?

    <p>Interdependent (A)</p> Signup and view all the answers

    What is the primary role of plants in the ecosystem?

    <p>To convert sunlight into energy (D)</p> Signup and view all the answers

    What is the result of the photosynthesis process on the atmosphere?

    <p>An increase in oxygen (A)</p> Signup and view all the answers

    Which component of an ecosystem is primarily responsible for regulating the flow of energy and nutrients?

    <p>Biotic components (C)</p> Signup and view all the answers

    What is the ultimate consequence of the interactions between biotic and abiotic components in an ecosystem?

    <p>Maintenance of balance and stability (D)</p> Signup and view all the answers

    Which process is essential for releasing oxygen into the atmosphere?

    <p>Photosynthesis (A)</p> Signup and view all the answers

    What is the primary role of microorganisms in an ecosystem?

    <p>Decomposers (C)</p> Signup and view all the answers

    What is the term for the specific physical space in which an ecosystem operates?

    <p>Ecosystem (C)</p> Signup and view all the answers

    Which component of an ecosystem is responsible for absorbing carbon dioxide from the atmosphere?

    <p>Plants (D)</p> Signup and view all the answers

    What is the primary function of abiotic components in an ecosystem?

    <p>Providing habitat for biotic components (B)</p> Signup and view all the answers

    What is the ultimate source of energy for almost all ecosystems?

    <p>Sunlight (C)</p> Signup and view all the answers

    What is the primary function of the respiration process in an ecosystem?

    <p>To release energy for cellular processes (D)</p> Signup and view all the answers

    What is the result of symbiotic relationships in an ecosystem?

    <p>Both species benefit (D)</p> Signup and view all the answers

    What is the primary role of abiotic components in an ecosystem?

    <p>To support the growth and survival of biotic components (C)</p> Signup and view all the answers

    What is the effect of competition between species on an ecosystem?

    <p>It affects the population sizes and distribution of the competing species (A)</p> Signup and view all the answers

    What is the primary goal of studying ecosystems?

    <p>To understand the interactions between biotic and abiotic components (B)</p> Signup and view all the answers

    What is the role of sunlight in the photosynthesis process?

    <p>It provides energy for plants to convert carbon dioxide and water into glucose (C)</p> Signup and view all the answers

    What is the result of feeding relationships in an ecosystem?

    <p>It controls the flow of energy and nutrients in an ecosystem (D)</p> Signup and view all the answers

    What determines the boundaries of an ecosystem?

    <p>The interactions and processes that occur within it (C)</p> Signup and view all the answers

    What is the primary characteristic of an ecosystem's size?

    <p>It can vary greatly in complexity and size (D)</p> Signup and view all the answers

    What is the ultimate source of energy for almost all ecosystems?

    <p>The sun (A)</p> Signup and view all the answers

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