Obsidian, a variety of volcanic glass, may be black, dark gray, red, or brown, depending on the presence of iron
Indicate whether the statement is true or false
True
Environmental & Atmospheric Sciences
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A wave traveling 1 m in 1 s with a frequency of 1 Hz has an amplitude of
A. 1 m. B. more than 1 m. C. less than 1 m. D. not enough information
Environmental & Atmospheric Sciences
Which of the following is NOT likely to be reflected in the "Under age 5 mortality indicator"?
A) infant deaths B) food availability C) public sanitation D) heart disease E) basic health services
Environmental & Atmospheric Sciences
What are the processes behind Sub-Saharan Africa's political map, and why have there been relatively few boundary changes since the 1960s?
What will be an ideal response?
Environmental & Atmospheric Sciences
Most orogenesis occurs along ________ plate boundaries
A) divergent B) convergent C) transform D) hot spot
Environmental & Atmospheric Sciences