The source of radon gas in the home is typically
A) decay of airborne uranium
B) uranium-bearing rocks and soil underlying the house
C) waste from uranium mining operations in the region
D) radioactive components of electronics equipment
B
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Despite efforts to end the practice, gerrymandering in the U.S. continues through the present
Indicate whether this statement is true or false
Which statement is more accurate?
A) Every parallel begins and ends at the poles. B) Every meridian is actually a circle rather than a curved line. C) Every meridian is the same length and has the same beginning and end. D) Every meridian is distorted by magnetic declination. E) Every parallel is the same length.
There are several long-term changes in Earth's orbit that affect how heat from the Sun is distributed over the planet. Which of the following describes how the orbit changes from being elliptical to more circular?
A. solar obliqueness B. axial cyclicity C. eccentricity D. axial tilt E. precession
The smallest terminal velocities are for:
A) condensation nuclei. B) cloud droplets. C) raindrops. D) none of the above