The earth's major layers formed because ________
A) the chemical composition of the solar nebula changed over time
B) the earth was heated after its formation resulting in melting and redistribution of major chemical compositions
C) the earth's mantle grew like a crystal forming around the earth's core but the crust was exposed to space and stayed more like the original material
D) radioactive decay caused materials to change over time and resulted in the layering
B
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Which of the following represents the correct charge sequence to create lightning?
A) A, negative; B, positive; C, negative
B) A, positive; B, negative; C, positive
C) A, positive; B, negative; C, negative
D) A, negative; B, negative; C, positive
The planet ________ is characterized by a strong greenhouse effect
Fill in the blank(s) with the appropriate word(s).
Consider the section "We Can Live More Simply and Lightly on the Earth." Do you agree that many of the things we now feel are necessities are actually luxuries? Could you do without them, or are they now part of your necessities? How does your worldview affect your sense of what is necessary?
What will be an ideal response?
Most U.S. hurricane deaths have been associated with sea surges occurring when a hurricane moves on land.
Answer the following statement true (T) or false (F)