Perhaps the most obvious of ________ surface features are its polar ice caps.
A. Pluto's
B. Mars's
C. Neptune's
D. Saturn's
E. Triton's
Answer: B
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Thousands of languages are ________. These were once in use, even in the recent past but are no longer spoken or read in daily activities by anyone in the world
A) endangered B) extinct C) lingua franca D) dialects E) none of the above
By the end of the Permian, small mammal-like reptiles, called ____________________, evolved from the pelycosaur
Fill in the blank(s) with correct word
Which of the following best describes Earth's outer core?
A. high-density rock B. low-density rock C. metallic liquid D. pure carbon E. metallic solid
Many communities are considering river floodplain restoration as a viable alternative to floodwalls and other "engineering solutions." The use of natural system restoration:
What will be an ideal response?