As air temperatures increase, evaporation increases, leading to more condensation and cloud formation. Low, thick cloud cover increases the albedo of the atmosphere, thereby having a cooling effect on Earth. This is an example of a
A) positive feedback loop.
B) negative feedback loop.
C) neither a positive or negative feedback loop.
B
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An element is a material
A. that has consistent physical properties. B. that has consistent chemical properties. C. with more than one type of atom. D. that is pure. E. consisting of only one type of atom.
Which of the following best matches the description?Molecule consisting of three atoms of oxygen.
A. particulates B. acid deposition C. thermal inversion D. primary air pollutants E. oxides of nitrogen F. ozone G. sulfur dioxide H. secondary air pollutants I. greenhouse effect J. radon K. photochemical smog
How much material is accreted to Earth from outer space on a daily basis?
A) 1,000,000 dust particles per day B) 10 grams per day C) 100,000 kg per day D) 10,000 liters per day
Thunder is caused by:
a. the collision between two thunderstorms with opposite electrical charge b. the rapid heating of air surrounding a lightning channel c. the explosion that occurs when + and - charge collide and neutralize each other d. turbulent wind motions inside the thunderstorm