A blocky clastic sedimentary rock composed of mud would be called a
A) siltstone.
B) mudstone.
C) claystone.
D) shale.
Answer: B
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Which of the following is the best indication that limestone caves could be present at depth?
A. gently sloping hills B. springs C. large quartz crystals laying on the surface D. limestone pillars and sinkholes E. cliffs and overhangs along rivers
All living things of the Earth system constitute:
a. atmosphere. b. lithosphere. c. hydrosphere. d. biosphere.
The greatest potential for developing entirely new types of agricultural crops depends upon
A) bioengineering new combinations of wheat and rice. B) grafting together different plants into one new type of plant, such as a plant with tomatoes and sweet potato roots. C) thousands of plant species that occur only in the wild. D) our ability to identify and culture new types of animal pollinators.
Georgia, bordering the Black Sea, experiences a more mild climate than Russia
Indicate whether the statement is true or false