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WorksheetsEarth's Environmental Systems
Total questions: 62
Worksheet time: 2hrs 2mins
Wolves and deer interact to keep stable populations of each through ___________ feedback.
positive
negative
predator-prey
none of the above
Algae on a pond keeps increasing until eventually the pond begins to fill in. This illustrates _____________ feedback.
negative
positive
photosynthetic
natural
The geosphere is also known as the
lithosphere
magmasphere
cryosphere
anthroposphere
lithosphere?
hormones
A(n) _______ is a substance with a pH greater than 7.
Base
Acid
Alkaline
Water
An acid
is a substance that releases H+ ions when dissolved in water
is a substance that does not release any ions when dissolved in water
is a substance that releases OH- when dissolved in water
releases an equal amount of OH- and H+ ions when dissolved in water
A base is a substance
That releases OH- ions when dissolved in water
That releases H+ ions when dissolved in water
Does not release any ions when dissolved in water
None of the above
Erosion decreases the soil's ability to hold water which leads to more erosion. Erosion is an example of a
biogeochemical cycle
negative-feedback loop
positive-feedback loop
all of the above.
This is NOT a part of the phosphorus cycle.
Phosphate is incorporated into sedimentary rocks
Phosphate bound to soil
Atmospheric phosphate
Phosphate is absorbed from the soil by plants
