All waterfalls eventually disappear because headward erosion slowly eats back the resistant ledge.
a. true
b. false
Ans: a. true
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Which is likely to happen at Lake Chad in Africa?
A. ecological collapse B. increased fish production C. increase in biodiversity D. decrease in water removal
What does a total fertility rate of 2.1 indicate?
A) that a population is at its replacement rate B) that a population has reached its peak C) that a population is growing quickly D) that a population is growing slowly E) A TFR that is less than 2.1 has no particular significance.
Temperature and precipitation in one part of the world can affect the weather in another widely separated region. What are these interactions called?
Because massive submarine structures such as seamounts and ridges exert stronger than average gravitational attraction, they produce depressed areas on the ocean's surface
Indicate whether this statement is true or false.