Atmospheric scientists often measure gases in parts per million by weight (ppm). If CO2 is currently 0.04% of the atmosphere, the level expressed in parts per million is
A) 4 ppm.
B) 4000 ppm.
C) 400 ppm.
D) 0.004 ppm.
C
You might also like to view...
A company finds that the number of times per year that an employee makes use of their company-sponsored insurance is a linear function of their age group:
Y = 12.4 - 10.9 X1 - 9.8 X2 - 6.5 X3 - 3.1 X4 where X1, X2, X3, and X4 are 20-29 year olds, 30–39 year olds, 40–49 year olds, and 50–59 year olds (the 60+ year olds have been omitted). What is the predicted number of annual insurance usages per group?
According to our text, which of the following is NOT true?
A) Affluent core countries are more effective at protecting their environments than poor peripheral countries. B) Core countries are more interested in protecting the environment because of their Judeo-Christian perspective on nature. C) Core countries help protect their environments by exporting industrial wastes to peripheral countries. D) Core countries help protect their environments through technological innovations.
What is the skier’s time to experience frostbite, given these conditions?
What will be an ideal response?
The last glacial advance peaked in North America about ____ years ago
a. 150 b. 3,000 c. 18,000 d. 100,000 e. 2.6 million