7.10AB 7th grade Assessment Review
9 months ago
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  • Question 1
    30 seconds

    At which labeled location would a rain forest most likely be found?

    answer choices





  • Question 2
    30 seconds

    Which of these explains why an ecosystem is healthy when it has a variety of species?

    answer choices

    An increased number of species allows for fewer food chains.

    A larger number of species reduces competition for abiotic resources

    A larger number of species allows for greater diversity in interdependence.

    An increased number of species contributes to greater chances for adaptability.

  • Question 3
    30 seconds

    Estuaries are called “the nurseries of the sea” because many species lay eggs and develop their young in estuaries. Which two features of estuaries support this role most?

    answer choices

    concentrated nutrients and a steep salt gradient

    abundant shelter and concentrated nutrients

    a steep salt gradient and shallow water

    shallow water and abundant shelter

  • Question 4
    30 seconds

    What is the main reason for concern about the destruction of coral reefs related to global warming?

    answer choices

    The most colorful fish live in coral reefs.

    Coral reefs are ideal locations for studying marine life.

    Hundreds of thousands of species depend on coral reefs.

    Coral reefs can reduce shoreline damage from tsunamis.

  • Question 5
    30 seconds

    Why are seals able to live off the coast of Antarctica while frogs, snakes, and panthers are not?

    answer choices

    Seals can swim.

    Seals are predators.

    Seals have fur and blubber.

    Seals are warm-blooded animals.

  • Question 6
    30 seconds

    In some New Zealand estuaries, shellfish-bed populations have declined due to habitat modification and overharvesting. How will this affect the biodiversity of these ecosystems?

    answer choices

    Biodiversity will increase along with the number of shellfish people can harvest.

    Biodiversity will increase along with the value of the shellfish when people sell them.

    Biodiversity will decrease as well as the number of available shellfish.

    Biodiversity will decrease as well as the competition for harvesting shellfish.

  • Question 7
    30 seconds

    Which characteristic below describes a jaguar’s niche?

    answer choices

    hunts during the night.

    has a coat with dark spots.

    gives birth to up to four cubs.

    has a life span of 12 to 15 years.

  • Question 8
    30 seconds

    In which way are rainforests and coral reefs different from ecosystems with few species?

    answer choices

    There are more prey than predators.

    The food web is more stable and lasting.

    Organisms often must compete for food.

    Plant populations are the primary producers.

  • Question 9
    30 seconds

    The temperate deciduous forest and temperate grassland biomes have the same maximum temperature. Which of the following is a reason they have different plant and animal species?

    answer choices

    they are at different altitudes

    they are at different latitudes

    the forest gets more precipitation

    the grassland gets more precipitation

  • Question 10
    30 seconds

    Which of these is a threat to the survival of an ecosystem?

    answer choices

    predator-prey population cycles

    less biomass at higher levels of the food web

    a shrinking variety of animal and plant species

    competition among some consumer populations

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