Pyroclastic debris is ________.
A. the SiO2-rich magma that flows quickly down the side of a volcano
B. the SiO2-poor magma that remains as gas escapes lava as it flows
C. solid pieces of rock contained within, and transported by, lava
D. chucks of magma and rocks blown into the air by gas in a volcanic eruption
Answer: D
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Parking lots are major sources of point source pollution for rivers and lakes.
Answer the following statement true (T) or false (F)
Which of the following locations would contribute to mid-latitude cyclogenesis?
A. the upwind side of a mountain chain B. relatively cold water offshore from a warm land mass C. along cold constant pressure surfaces D. relatively warm water offshore from a cold land mass
A stream begins at an elevation of 200 meters and flows a distance of 400 kilometers to the ocean. What is the average gradient?
a. 0.5 km/in b. 2 km/m c. 0.5 m/km d. 2 m/km
A hypothesis is ________
A) a proven scientific fact B) an instrument that is used to examine environmental conditions C) a statement that explains an observed phenomenon or answers a question D) the design of an experiment that can be used in scientific enquiry E) a prediction about something that has not yet been observed