What should be used to clean fire hoses?

a. Class A foam
b. a dilute bleach solution
c. mild detergent
d. TSP (trisodium phosphate)

Answer: c. mild detergent

Environmental & Atmospheric Sciences

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Which of the following molecules is most likely to show the strongest hydrogen bonding?

A. CH4
B. H-C  C-H
C. CH3OH
D. CH3SH
E. A, B, and C

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Some of Earth's water supply originated from

A) photosynthesis. B) icy comets. C) gases expelled from the Sun; i.e., solar wind. D) asteroids.

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An atom has 2 electrons, 3 protons, and 3 neutrons. What is the atom's charge?

A) ?2 B) +8 C) +1 D) ?1 E) +3

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Banded iron formations consist of alternating thin layers of chert and iron minerals. Indicate whether the statement is true or false

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Environmental & Atmospheric Sciences