How much of the water on Earth is found in the ocean?
a. 3%
b. 67%
c. 71%
d. 90%
e. 97%
e
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The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C. It is a weak conductor of electricity, its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air
Which of the following is a chemical property of silicon? A) its ability to conduct electricity B) its density C) its melting point D) its ability to react with oxygen E) C and D
Most scientists believe that the Big Bang took place approximately ____ years ago
A)140 billion B)40 billion C)14 billion D)140 million E)40 million
The San Andreas Fault is a(n) ________ boundary
Fill in the blank(s) with correct word
Match the term with the correct description.?
A. ?forged an agreement among Canadian timber companies, environmentalists, native peoples, and the provincial government of British Columbia (Canada) to protect Great Bear Rainforest from destructive logging B. ?an environmental impact statement (EIS) must be developed C. ?Gaylord Nelson and Denis Hayes D. ?protected whales from hunting E. ?prohibits international trade of endangered species