What is a geothermal gradient? Given an average geothermal gradient for continents and a surface temperature of 15°C, what is the temperature at a depth of 10 kilometers?
What will be an ideal response?
The geothermal gradient is the increase in temperature that occurs with the increase in depth below Earth's surface. Using an average of 25?C/km, then at 10 km depth the temperature would be 265?C (15º at the surface + (10 km)(25º C/km)).
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Compare two air parcels at sea level that have the same size but different temperatures. Which of the following describes the colder parcel of air?
A. The pressure is the same, but the density is lower than the warm parcel. B. The pressure is the lower, but the density is the same as the warm parcel. C. The pressure is higher, but the density is the same as the warm parcel. D. The pressure is the same, but the density is higher than the warm parcel.
Lower frequencies of sound are absorbed sooner than higher frequencies in water. Indicate whether the statement is true or false
Which of the following best describes air pollution?
A) Both natural and anthropogenic gases, particles, and other substances in amounts that cause damage to the environment or are harmful to humans. B) Solely anthropogenic gases, particles, and other substances in amounts that cause damage to the environment or are harmful to humans. C) Solely natural gases, particles, and other substances in amounts that cause damage to the environment or are harmful to humans. D) A distinct class of gases, particles, and other substances that the EPA has deemed worthy of regulating.
Most bathymetry measurements were made by sensors carried on ships.
Answer the following statement true (T) or false (F)