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Converting a prairie to a farm field is an example of________.

Why does global climate change matter. There are multiple right answers. Please pick all that apply for full credit.

Exotic species can  become invasive in their new habitat, because of absence of their predators.  They can threaten the native species by competing for their resources, being predators, or bringing disease.

_______________ happens when nutrient runoff causing microorganisms (esp. algae) to grow in excess and deplete oxygen for other living things

What would happen to the pH of a strong acid if you added a weak base to it? [answer1] What would happen to the pH of weak acid if you added a strong base to it? [answer2] What would happen to the pH of a strong acid if you added strong base? [answer3] 

Which of the following are the 3 important buffer systems in the human body?

Which of the following biomes is characterized by year-round consistent precipitation, deciduous trees, rich soil, and warm summer?

The process whereby oxygen is depleted by the growth of microorganisms due to excess nutrients in aquatic systems is called ________.  

Displacement is the correct method for determining the volume of an irregular object. [answer1]   How do you calculate displacement? final water volume [mathsymbol] initial water volume

When synthesizing aspirin, 3.012 g of salicylic acid (138.121 g/mol) were used. 2.538 g of aspirin (180.158 g/mol) were recovered. Answer must be to correct significant figures and proper units.   Calculate the theoretical yield of aspirin. [answer1] Calculate the percent yield. [answer2] Calculate the percent error. [answer3]