Which two ideas were combined to form the theory of plate tectonics?
A. Continental drift and the Big Bang
B. Continental drift and seafloor spreading
C. Continental drift and the scientific process
Answer: B
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Sustainable Development Goals are designed to build upon:
A. The ten Century Goals B. The National Environmental Policy Act C. The eight Millennium Development Goals D. The Clean Water Act
What is the relationship between density and specific gravity?
A) They both have the same definition. B) They both represent the same dimensional units. C) They can have the same numerical value. D) They both measure substances in the same way.
Which is the most important molecule in the ecosystem?
A) salt B) nitrogen C) water D) lead E) oxygen
The typical amount of time it takes for an air mass to pass over a given area is on the order of a few:
A) months. B) weeks. C) days. D) minutes. E) hours.