The "altithermal" describes a cold period of Earth's history
a. True
b. False
Indicate whether the statement is true or false
False
Environmental & Atmospheric Sciences
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Which of the following sources of iron would be of the highest quality?
a. iron deposits on the ocean floor b. a field of spinach c. a large scrap metal junkyard d. a half-mile deep deposit of iron ore e. soil that is high in iron content
Environmental & Atmospheric Sciences
About a quarter of all jobs in the United States are in business services
Indicate whether the statement is true or false.
Environmental & Atmospheric Sciences
Groundwater
What will be an ideal response?
Environmental & Atmospheric Sciences
Which of the following Vikings is credited with discovering Greenland?
A) Erik Thorvaldson B) Bjarni Herjolfsson C) Leif Eriksson D) Thor Heyerdahl
Environmental & Atmospheric Sciences