Calculate the percent increase in CO2 between 1960 (at 320 ppm) and 2010 (at 400 ppm). The best answer is
A. 80%.
B. 400%.
C. 25%.
D. 20%.
Answer: C
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Why do we use the pH scale to indicate the acidity of a solution rather than simply stating the concentration of hydronium ions?
A) It includes the concentration of hydronium and hydroxide ions. B) It is used because the general public understands it. C) It is more accurate to use the pH scale. D) It is more convenient, since the concentration of hydronium ions is so small.
________ is the powdered form of the mineral
A) Density B) Streak C) Hardness D) Crystal habit
Describe the relationship between the following: wave height, wavelength, wave speed, and wave steepness
What will be an ideal response?
In an advancing glacier
A. ablation exceeds accumulation. B. basal sliding always occurs. C. accumulation exceeds ablation. D. accumulation equals ablation.