What steps would you take in order to identify a mineral by its physical properties?
What will be an ideal response?
Answer: Test the hardness against substances/objects of known hardness; search for the number of cleavage planes and their orientation relative to one another. Identify the luster. Attempt to streak the mineral against a ceramic plate. Drop hydrochloric acid on it. See if it's magnetic. Compare all of these criteria to known properties for minerals, perhaps from my lab manual.
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What features might make nuclear power plants safer?
What will be an ideal response?
What would happen to a river delta if damming reduced the amount of sediment in the river?
a) Nothing much would change because the water flows through the delta. b) The delta would stop growing. c) River water quality would improve. d) The delta would continue to grow as long as the river flows. e) The delta would erode and subside below sea level.
The image below shows a beam of radiation passing between two electrically charged plates. 
Which of the beams is actually composed of particles?
A. a B. b C. c D. a and c E. all of the above
The number of American farmers has decreased from ________ to ________ since 1950
A) 50 million; 10 million B) 5 million; 0.5 million C) 6 million; 2 million D) 25 million; 15 million E) 25 million; 10 million