The most violent volcanic explosions are generated from
A) basaltic lava flows.
B) andesitic lava flows.
C) granitic lava flows.
D) ocean floor lava flows.
Answer: B
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Why was Herschel's strategy for mapping our Galaxy flawed?
A) His infrared telescopes couldn't penetrate the dust clouds. B) He used globular clusters, lying above the dust in the disc. C) He relied on visual wavelengths, which are obscured by dust. D) He used radio telescopes that didn't give enough resolution. E) He assumed Earth was at the extreme edge of the Galaxy.
Answer the following statement(s) true (T) or false (F)
1. The earth’s equilibrium temperature depends on its radius
Fahrenheit and Kelvin scales agree numerically at a reading of:
A. -40 B. 0 C. 273 D. 301 E. 574
John and Linda are arguing about the definition of density. John says the density of an object is proportional to its mass. Linda says the object's mass is proportional to its density and to its volume. Which one, if either, is correct?
a. They are both wrong. b. John is correct, but Linda is wrong. c. John is wrong, but Linda is correct. d. They are both correct. e. They are free to redefine density as they wish.