Which of the following could be used to separate the components of a mixture of ethyl alcohol (ethanol) and water?
A) pouring the liquid off the solid
B) distillation
C) filtration
D) none of these
B
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What major effect has the Argentina fire ant had on southeastern ecosystems?
A. They wipe out native ants. B. They take up mounds of dirt around their holes. C. They sting people. D. They provide food for armadillos. E. They eat food supplies of other insects.
Compare and contrast the formation of high pressure and low pressure atmospheric systems on precipitation and temperature in the areas where they form
What will be an ideal response?
Most organisms' niches are controlled by
A. Lessons learned from parents B. Behavior learned from others in their social groups C. Luck D. Genetic trait for adaptive characteristics E. The predators and competitors they encounter
Which of the following terms refers to the density of water vapour in a given parcel of air?
A. mixing ratio B. specific humidity C. absolute humidity D. relative humidity