Examlex
Stars that have ejected a planetary nebula eventually become
Sulfur Oxide
A group of chemical compounds that are a combination of sulfur and oxygen, often associated with air pollution and acid rain.
Toxic Air Pollutants
Harmful substances in the air that pose health risks to humans and the environment, regulated under environmental laws.
EPA
The Environmental Protection Agency, a U.S. federal agency responsible for protecting human health and the environment by writing and enforcing regulations.
Asbestos
A group of naturally occurring mineral fibers used in building materials that are hazardous to health when inhaled.
Q6: Astronomers now speculate that a galaxy's shape
Q12: Why would parallaxes be easier to observe
Q17: _ appear reddish in color due to
Q20: The study of the oscillations of the
Q24: The Milky Way galaxy is part of<br>A)
Q33: The neutral hydrogen atom consists of<br>A) one
Q40: The solar nebula theory is NOT able
Q66: The Orion region contains young main-sequence stars
Q71: Most of the energy emitted by the
Q100: A new generation of ground-based telescopes is