What is the modern explanation of the "guest stars" that suddenly appeared in the night sky?
What will be an ideal response?
They are normal stars that are usually too faint to be visible but increase in brightness as they explosively eject gases from their surface. They are known as novae or supernovae.
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A climate that has approximately six months of dry weather and a corresponding six months of wet weather would be a(n) ________ climate
A) desert B) Mediterranean C) European mid-latitude D) Monsoonal
Rocks may behave differently over the long spans of geologic time than they do in short-term laboratory experiments.
Answer the following statement true (T) or false (F)
How would the eruption of a volcano cause global climate changes?
A. Dust from the volcano blocks sunlight. B. Sulfuric acid is produced which interferes with solar radiation. C. It can cause stratospheric ozone reduction allowing increased ultraviolet light to reach the Earth's surface. D. Both "Dust from the volcano blocks sunlight" and "Sulfuric acid is produced which interferes with solar radiation." E. Both "Sulfuric acid is produced which interferes with solar radiation" and "It can cause stratospheric ozone reduction allowing increased ultraviolet light to reach the Earth's surface."
A clastic sedimentary rock composed of mud and splits into sheets would be called a
A) shale. B) mudstone. C) claystone. D) siltstone.