<p>dude you gave the answer in the question…</p>
<p>to the biodiversity question…</p>
<p>specialist would be screwed.also, environmental degradation. food webs and chains would mess up etc</p>
<p>Explain the difference between stratospheric and tropospheric ozone.Also, describe the process in which tropospheric ozone is created.(chemical equations are good as well)</p>
<p>I am not taking the AP Environmental Exam, but the answer to the upper question is “oxygen is the most abundant element in the earth’s crust”.</p>
<p>Freshman-year earth science from three years ago for the win!</p>
<p>haha thats right sligh_anarachist</p>
<p>okay tougher one.</p>
<p>What is the SECOND most abundant element in the earth’s crust?</p>
<p>stratospheric ozone = good b/c it captures UV rays</p>
<p>tropospheric ozone = bad b/c it is a powerful oxidizing agent that can form toxic compounds with other chemicals… leads to creation of smog</p>
<p>tropospheric ozone is created when nitrogen oxides and volatile organic compounds react with sunlight in the troposphere</p>
<p>yep its o i think (:</p>
<p>Q: put this in order of size
Community, population, biosphere, ecosystem, species</p>
<p>from most inclusive to least inclusive:</p>
<p>biosphere, ecosystem, community, population, and species.</p>
<p>answer my question! haha</p>
<p>is it nitrogen?</p>
<p>Nope, any other guesses? This question came out on a previous CB released test, so it might be good to know.</p>
<p>uhh…i guess ur offline =(
Q: what fraction of water is fresh water?</p>
<p>Oh ur online 
hehehe
hmm idk about the crust =[
and do you have any MC questions for APES? if you do i would really really appreciate it >//<</p>
<p>fresh water = 2%</p>
<p>fine, I’ll release the answer for that question. It’s silicon! </p>
<p>Nope, we just took some practice tests in the class.</p>
<p>oh okayy…
so most abundent is oxygen; second is silicon.
Q: what is the place that contains 78% of nitrogen and 21 % of oxygen?</p>
<p>earth’s atmosphere</p>
<p>Q: What country has the largest supply of proven coal reserves?</p>
<p>GPAx213: do you have msn? would you wanna do this review on msn since its only two of us?</p>
<p>The United States?</p>
<p>Q: explain the principle of superposition</p>
<p>I don’t have msn, but I do have aim. I prefer talking privately as well since it’s only two of us… Do you have aim kawaiigurl?</p>
<p>The United States?</p>
<p>Q: explain the principle of superposition</p>
<p>sry i don’t have aim =[
i have Yahoo Messenger too…if you have it.</p>
<p>nope don’t have it. 
I guess we just have to talk over CC</p>
<p>yeah it’s united states.</p>
<p>superpostion = the oldest rocks on bottom and youngest on top (sedimentary rocks)</p>
<p>Q: What are some unconventional oil resources?</p>
<p>hmm i don’t really understand this question…
would it be Crude oil? :S</p>
<p>(p.s do u think we should go over this by topic? for example, we were just talkin about earth structure…)</p>
<p>Q: what are some causes of volcanism?</p>