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DCA 2 Review 7th Grade

  •  English    15     Public
    Organisms and Environments
  •   Study   Slideshow
  • An abandoned garden has been cleared of all vegetation, and only a layer of nutrient-poor soil remains. What will most likely be observed in the garden area first?
    Weeds, Grass, Flowers
  •  15
  • How do deltas form?
    When water from a river slows down when it hits the ocean, it drops the sediment it was carrying
  •  25
  • Limestone and Calcium Carbonate are special types of rock that, when touched my acid rain, start to break down. What is this called?
    Physical weathering
    Physical erosion
    Chemical weathering
    Chemical erosion
  •  15
  • Name all of the secondary consumers
    Rattlesnake, Tarantula, Hawk, Lizard
  •  15
  • Why does biodiversity increase sustainability?
    more species and adaptations allows more organisms to adapt after events happen
  •  25
  • Define an autotroph and heterotroph
  •  20
  • What creates biodiversity?
    More abiotic factors
    More ecosystems
    More organisms
    More species
  •  15
  • Name the steps of secondary succession in order using shrubs, trees, grass, climax community
    grass, shrubs, trees, climax community
  •  20
  • What is/are the pioneer species for primary succession?
    Lichens and moss
  •  20
  • What percent of energy is passed up an energy pyramid and how much is lost as heat?
    10% and 90%
  •  15
  • If the grass produces 2,000J of energy, how much do the snakes receive?
    20J
  •  15
  • What's the difference between groundwater and surface water?
    Groundwater is underground like aquifers. Surface water is on top of the ground like rivers and lakes
  •  5
  • How does agriculture pollute our water?
    Fertilizer, feces, sediment
  •  10
  • What is the relationship between biodiversity and sustainability?
    The more biodiversity, the more sustainability.
  •  10
  • Explain how mountains change over time using the words weathering, erosion, and/or deposition
    Wind can carry sand and when it hits mountains, it will weather away the mountainside, causing it to change
  •  20