Which of the following pairs of liquids are miscible in all proportions?
A) ethanol and water
B) ethanol and oil
C) gasoline and water
D) none of these
A
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According to Galileo, the test of scientific truth is
A. evident patterns in nature. B. philosophical discussion. C. experiment. D. logic.
The evolution of pesticide resistance, resurgence, and secondary-pest outbreaks are only some of the problems that result from reliance on
A) crop rotation and biological controls, which disrupt the natural dynamics of ecosystems. B) pesticides, creating the need to alternate between a pesticide and an herbicide every other year. C) rodenticides to kill weeds and insect pests and prevent the spread of viral diseases. D) pesticides, creating a never-ending pesticide treadmill and requiring new pest-fighting strategies.
Increased atmospheric CO2 may lead to plants in some regions of the world producing more leaves
Indicate whether the statement is true or false
What event do scientists think created the Caloris Basin on Mercury?
A. collision with a Mars-sized body B. extreme tectonic activity C. melting from extreme solar activity while Mercury was forming D. impact by a large asteroid