Positive feedback loops are always a good thing.
Chapter 3: Earth's Environmental Systems

Quiz
•
Science
•
9th Grade
•
Hard
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
True
False
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In general, algal blooms occur when
toxins accumulate in shellfish.
nutrients decrease in the water.
nutrients increase in the water.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the result of a negative feedback loop in a system?
Stabilization of the system
System moving to an extreme
Increase in energy input
Decrease in matter input
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When the physical and chemical breakdown of rocks causes phosphate ions to be released is also called _________________.
Decomposition
Sedimentation
Uplift
Weathering
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the layer beneath the Earth's crust called?
Outer core
Inner core
Upper mantle
Lower mantle
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What causes plankton blooms and hypoxia in the Gulf of Mexico?
Nutrient-rich runoff
Overfishing
Oil spills
Climate change
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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