What is the difference between a resource and a reserve?
What will be an ideal response?
Answer: A resource is a useful mineral ultimately available commercially, whereas a reserve is a previously identified deposit from which minerals can be extracted profitably.
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Lateritic soils are a problem for human use because they
A. have expansive clays. B. have no leaching. C. are so dry. D. lack plant nutrients.
A hanging valley _____
a. is a stream valley that was adjacent to glaciers, but was never glaciated b. marks where a glacier extended below sea level c. blocked the flow of one or more glaciers d. once contained a tributary glacier e. is a glaciated valley that was later uplifted by tectonic forces
Discuss the differences between a manipulative and a natural experiment
What will be an ideal response?
Ocean water originated mainly from degassing of the Earth's interior.
Answer the following statement true (T) or false (F)