What is the ratio of parent atoms to daughter atoms after three half-lives?
What will be an ideal response?
Answer: 1:7
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What are the characteristics of the Jovian planets? What will be an ideal response?
Which is NOT a major international labor flow?
A) Mexico and the Caribbean to the United States B) South American countries to Argentina, Venezuela, and Peru C) from North Africa and southern Europe to northwestern Europe D) from Indonesia to Malaysia, Singapore, and Australia E) All of the above are major international labor flows.
Ventifacts are ____
a. made of loess b. found on Mars c. the product of stream erosion d. found in sand dunes
Sunspot activity
A) typically varies in number on a roughly eleven-year cycle. B) was first observed in the late nineteenth century. C) typically has the same number of sunspots per year. D) has been conclusively linked to climate changes.