________ is a rock composed of fine-grained pyroclastic particles.
A. Pumice
B. Tuff
C. Scoria
D. Rhyolite
E. Obsidian
Answer: B
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A) They were dim. B) They were small. C) They had a red shift character. D) Their brightness varied.
The ________ wavelengths of light penetrate deepest into the ocean.
A. red B. black C. infrared D. blue E. ultraviolet
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Manitoba became a province of Canada in:
A) 1492 B) 1776 C) 1870 D) 1919