ERM 430 Exam Questions & Answers 2024/2025
Air - ANSWERStasteless, odorless, and invisible mixture of gases that surrounds the earth
% Nitrogen in air - ANSWERS78
% Oxygen in air - ANSWERS21
% Carbon Dioxide in air - ANSWERS0.03
% Argon (inert) in air - ANSWERS< 1
Gas in air ...
Air - ANSWERStasteless, odorless, and invisible mixture of gases that surrounds the earth
% Nitrogen in air - ANSWERS78
% Oxygen in air - ANSWERS21
% Carbon Dioxide in air - ANSWERS0.03
% Argon (inert) in air - ANSWERS< 1
Gas in air - ANSWERSwater vapor
Troposphere - ANSWERSNinety five percent of the earth's atmosphere and
all of its life is concentrated in a layer only 11 to
20 km thick surrounding the earth's crust
The present gaseous composition of earths atmosphere is the result of? - ANSWERSVarious processes
over the last 4.6 billion years
What did earth's early atmosphere not contain? - ANSWERSFree oxygen and that all water probably
existed as water vapor
After 5 million years what happened to the earth? - ANSWERSCooled sufficiently so that some of the
water vapor condensed to a liquid
, The oceans were subsequently formed and large amounts of what were dissolved into it, substantially
lowering the atmospheric concentration. - ANSWERSCarbon dioxide
When did living organisms first appear on earth? - ANSWERS3.5 million years ago
What was the first organism to exist? - ANSWERSPhotosynthetic blue-green algae and they removed
additional CO2 fro the atmosphere and released O2
What was a consequence of increased atmospheric O2? - ANSWERSOzone layer formation
What is the variation of temperature with altitude in the atmosphere? - ANSWERSAs altitude increases,
temperature decreases
How many temperature zones is the atmosphere divided into? - ANSWERS4: trophosphere, stratosphere,
mesosphere, thermosphere
Stratospheric ozone is also known as the _____________. - ANSWERSOzone layer
What is the ozone called in the lower region of the atmosphere? - ANSWERSTrophosphere
Vertical structure of the atmosphere. - ANSWERSAs altitude above the earth's surface increases,
atmospheric pressure decreases and the number of molecules of any gas decreases per unit volume of
atmosphere.
Ozone transport visualization - ANSWERSHigher during summer months
Air pollution - ANSWERSgaseous or particulate substances released into the atmosphere in sufficient
quantities or concentrations to cause injury to plants, animals or humans
When is air "polluted?" - ANSWERSWhen it is no longer tasteless, odorless or colorless
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Bensuda. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.49. You're not tied to anything after your purchase.
