Which of the following has the lowest ionization energy?
A) Ba
B) Ca
C) Mg
D) Sr
A
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Desertification is most common in tropical and subtropical areas
Indicate whether this statement is true or false.
Why was Alfred Wegener's idea of continental drift dismissed?
A) Someone else had already introduced his idea to the scientific community. B) Many of his evidences did not support drifting continents. C) Continents have not moved since Earth was created. D) The evidence at the time seemed to suggest a solid mantle that did not allow drifting of continents to be possible.
Stationary fronts
A) are usually cloudless. B) are the same as occluded fronts. C) occur when two cold fronts meet. D) occur inside a single air mass. E) are often accompanied by precipitation.
This extensive biome stretches from the east coast of Canada to the Canadian Rockies, as well as across the entire extent of Russia to the European Plain and at high elevations at lower latitudes
A) midlatitude broadleaf and mixed forest B) boreal and montane forest C) desert D) arctic and alpine tundra