About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is_____.
A. Oxygen
B. Cabon Dioxide
C. Silicn
D. Clay
Acid rain is mainly caused by emissions of _____ in the atmosphere.
A. Sulfur Dioxide and Potassium Nitrate
B. Sulfur and Charcoal
C. Nitrogen Oxide and Potassium Nitrate
D. Sulfur Dioxide and Nitrogen Oxide » Read More…
In general, wind speed of 105–137 caused_____.
A. minor or no damage
B. considerable damage
C. severe damage
D. extreme damage
Who is considered the founder of meteorology?
A. Aristotle
B. Plato
C. Einstein
D. Newton
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