What is the dominant character of the four outer planets?
A. All are cold and icy world.
B. They lack associated moons.
C. All are blue-green.
D. Each has a form of plate tectonics.
E. They are large and gas rich.
Answer: E
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It has been estimated that humanity's global ecological footprint exceeds the Earth's biological capacity by about ____________________
Fill in the blanks with correct word
Sodium chloride as a compound does not truly exist in the ocean
a. True b. False
Biological nutrient removal ultimately converts most of the organic materials in wastewater into
A) oxygen, ammonia, and carbon dioxide. B) nitrogen, water, and carbon dioxide. C) sugars, vitamins, and minerals. D) proteins and carbohydrates.
In the Southern Hemisphere about ________ percent of the surface is land
A) 19 B) 25 C) 34 D) 55 E) 78