Earth is about ________ years old.
A. 50 million
B. 3,500 million
C. 13.5 billion
D. 4.5 billion
E. 30,000 thousand
Answer: D
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Which of the following is NOT a threat to endangered sea turtles?
a. Use of their shells for tortoiseshell jewelry. b. Use of the turtles for food and medicinal ingredients. c. Use of their fins for fin soup that is considered an aphrodesiac. d. Discarded fishing lines and nets. e. Degradation or loss of beach habitat.
Describe the electrical properties of the D-layer of the ionosphere and explain its relationship to the transmission of AM radio waves
What will be an ideal response?
The process by which ice evaporates directly from the surface of a glacier is known as
____________________. Fill in the blank(s) with the appropriate word(s).
Discuss five important human modifications of the Southwest Asian and North African environment, and assess whether these changes have benefited the region
What will be an ideal response?