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Revision Science 8

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  • Which two animals show adaptive features for being secondary consumers?
    1 and 3
    2 and 3
    2 and 4
    1 and 4
  • What is meant by the term ‘trophic level’?
    The number of individuals in a population
    The total amount of energy in an ecosystem
    The position an organism occupies in a food chain
    The type of community in a habitat
  • Producers are always at the end of a food chain. True or False?
    True
    False
  • A particular animal species only eats plants. What is a description of this animal species?
    a secondary consumer
    a primary consumer
    A carnivore
    A producer
  • A population is made up of different species living in the same habitat. True or false?
    True
    False
  • The diagram shows a marine food web.At which trophic levels is the cod found?
    secondary consumer only
    tertiary consumer only
    primary consumer and secondary consumer
    secondary consumer and tertiary consumer
  • Which of the following is an example of a population?
    The soil, water, and rocks in a desert
    All the plants and animals in a rainforest
    All the zebras living in a savanna
    A lion, a zebra, and an elephant living in a zoo
  • What does a community in an ecosystem include?
    Only the plants in an area
    All living and non-living things in an area
    All living organisms in an area
    Only the animals in an area
  • Which statement is true about energy transfer in a food chain?
    Energy increases as you go up the chain
    Producers have the least energy
    90% of energy is passed to the next level
    Only 10% of energy is transferred to the next level
  • What is a population?
    A group of different species living together in an area
    A group of the same species living in the same area
    A group of plants and animals interacting
    All non-living things in an environment
  • Which diagram best represents feeding relationships in an ecosystem?
    Food web
    Energy pyramid
    Pyramid of biomass
    Food chain
  • Energy decreases as you move up the food chain. True or False?
    True
    False
  • What does the term species mean?
    a group of vertebrates that reproduce sexually
    a group of animals that reproduce asexually
    a group of organisms that can reproduce to produce fertile o
    all the plants that live in the same area at the same time
  • In a food chain, energy is lost at each level. What is the main reason for this?
    Consumers gain 100% of the energy from their food
    Organisms store energy forever
    Energy is created at each level
    Energy is used for life processes like movement and growth
  • Which of the following best describes an ecosystem?
    All carnivores in a food web
    A community and its physical environment interacting
    A group of the same species living together
    A group of abiotic factors
  • An ecosystem includes both living and non-living components. True or False
    False
    True
  • Which of the following best defines a decomposer?
    An organism that breaks down dead organisms
    An animal that eats plants
    A predator that hunts prey
    A producer that uses sunlight
  • Which of the following is a correct statement about a food web?
    It is a single path from producer to top predator
    It shows energy transfer in one direct line
    It includes many interconnected food chains
    It only includes herbivores and carnivores
  • Which diagram shows the correct order in a food chain?
    C
    A
    B
    D
  • Which terms describe the position of the fox in this food chain?
    C
    B
    A
    D
  • What role do producers play in a food chain?
    They feed on animals only
    They break down dead material
    They convert sunlight into energy through photosynthesis
    They consume other organisms for energy
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