Pulverized rock and clastic materials ejected violently during an eruption are called
A) cinders.
B) explosive debris.
C) tephra, or pyroclastics.
D) volcanic ash.
C
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________ is not part of the hydrologic cycle.
A) Water infiltrating into the soil and bedrock B) Water evaporating from a lake C) Calcium carbonate dissolving in soil water and groundwater D) Water moving into creeks and streams following a rainstorm
Which of the following is the BEST indicator of the actual amount of water vapor in the air??
a. ?air temperature b. ?saturation vapor pressure c. ?relative humidity d. ?dew point temperature e. ?mixing ratio
Flowing air responding to the difference between higher and lower pressure is responding to the ________
A) pressure gradient B) Coriolis effect C) anticyclone D) intertropical convergence E) trade winds
The main part of Russia is so big that it requires __________ time zones.
a. four b. six c. ten d. five e. eight