Which of the following statements is untrue?
A. Covalent molecules can have nonbonding electrons.
B. Covalent bonds can involve more than one pair of electrons.
C. Covalent molecules usually have low melting points.
D. Covalent molecules are never crystalline.
E. All of the above statements are true.
Answer: D
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The Apennines are found primarily in which nation?
A) Spain B) Switzerland C) Italy D) Greece E) Hungary
Given an environmental lapse rate of 5°C/1000 m and a dry adiabatic of 10°C, what would what would happen if unsaturated air that had a temperature of 25°C at the surface were forced to rise 2000 m in the air?
A) It would sink back to the surface because it was more dense than the surrounding air. B) It would be warmer than the air around it so it would keep rising. C) It would keep rising because it would be less dense than the surrounding air. D) It would have the same temperature and density as the surrounding air so it would stay at that height. E) It would be colder than the air around it so it would sink.
What are the different layers, or horizons, that compose a soil profile? What makes each one distinct from the others?
What will be an ideal response?
Eutrophication does not occur naturally; it is the result of human activities altering the nutrient balance in water.
Answer the following statement true (T) or false (F)