Atmosphere & Environment
6 reference items
Which atmospheric layer lies closest to the Earth's surface?
A
Troposphere
Explanation
The troposphere contains about 75% of the atmosphere's mass and is where all weather occurs.
Which atmospheric layer contains the protective ozone layer?
A
Stratosphere
Explanation
The stratosphere absorbs high-energy ultraviolet radiation from the sun, protecting life.
Which is the absolute coldest layer of the Earth's atmosphere?
A
Mesosphere
Explanation
Temperatures in the mesosphere drop as low as -90 degrees Celsius near its boundary.
Which primary gas is the most abundant in Earth's atmosphere?
A
Nitrogen
Explanation
Nitrogen makes up approximately 78% of dry air by volume.
Which gas makes up approximately 21% of Earth's atmosphere?
A
Oxygen
Explanation
Oxygen constitutes roughly 20.95% of the atmosphere, vital for respiration.
Which toxic gas is primarily responsible for the production of acid rain?
A
Sulfur Dioxide
Explanation
Sulfur dioxide (SO2) and nitrogen oxides react with water vapor to form acid rain.