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DCA 2 Review 7th Grade
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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
What is the relationship between biodiversity and sustainability?
The more biodiversity, the more sustainability.
How does agriculture pollute our water?
Fertilizer, feces, sediment
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
If the grass produces 2,000J of energy, how much do the snakes receive?
20J
What percent of energy is passed up an energy pyramid and how much is lost as heat?
10% and 90%
What is/are the pioneer species for primary succession?
Lichens and moss
Name the steps of secondary succession in order using shrubs, trees, grass, climax community
grass, shrubs, trees, climax community
What creates biodiversity?
 
More species
 
More organisms
 
More ecosystems
 
More abiotic factors
Define an autotroph and heterotroph
Why does biodiversity increase sustainability?
more species and adaptations allows more organisms to adapt after events happen
Name all of the secondary consumers
Rattlesnake, Tarantula, Hawk, Lizard
Limestone and Calcium Carbonate are special types of rock that, when touched my acid rain, start to break down. What is this called?
 
Chemical weathering
 
Physical weathering
 
Chemical erosion
 
Physical erosion
How do deltas form?
When water from a river slows down when it hits the ocean, it drops the sediment it was carrying
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


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