The constant path that Earth travels in its orbit around the Sun describes a surface called the plane of the ____
a. equinox
b. inclination
c. ecliptic
d. declination
e. perihelion
c
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If the concentration of gold in seawater is 2.0 milligram per ton of sea water and the mass of the ocean is 1.5 × 1018 tons, how much gold is in the ocean?
A. 3,000 lb B. 300 g C. 36 mg D. 3.0 × 1012 kg E. 3.0 kg
The western portions of subtropical highs and gyres tend to be much stronger than eastern portions. This phenomenon is known as ________
A) upwelling B) downwelling C) western intensification D) latent heating E) cold current generation
Chicago's explosive population growth of the late 19th and early 20th centuries was due to industrialization and its excellent
A) railroad network. B) natural resources. C) educational system. D) political leadership. E) social programs.
Carcinogens, mutagens, and ___________ are toxic agents
Fill in the blanks with correct word