Which of the following are true of felsic magmas?
A) They tend to have high viscosities.
B) They do not allow gas bubbles to escape easily.
C) High gas pressures commonly lead to highly explosive eruptions.
D) All of these are correct.
D) All of these are correct.
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In bungee jumping, the change in a jumper's kinetic energy equals the average force of the bungee cord multiplied by the stretching
A) time. B) distance. C) both A and B D) none of the above
Which of the following is not a common cation that acts as a nutrient for plants?
A. sodium B. nitrogen C. magnesium D. potassium
The removal of soil components from the topsoil is called illuviation and their deposition in the subsoil is termed eluviation
a. True b. False Indicate whether the statement is true or false
Flow in a stream usually is fastest _______.
a - near the center and slightly below the surface b - near the mouth c - during low-flow conditions d - near the bottom e - near the sides