Scientists believe that the early Martian atmosphere was basically steam and as the surface cooled enough water was condensed, resulting in a lot of hydrogen, carbon dioxide, nitrogen, sulfur dioxide, and methane. ... During springtime the polar ice caps begin to melt and carbon dioxide is released resulting in a temporary thicker atmosphere. ... During the polar darkness period temperatures drop so low that carbon dioxide turns from a gas to a solid. The massive amount of frozen carbon dioxide decreases Mars" atmospheric pressure by 25% (Holmes). The ground surface becomes darker during the a...

• Word Count: 4020
• Approx Pages: 16
• Has Bibliography
• Grade Level: High School

The development of the spectrometer in the 1920s allowed scientists to find gases that existed in much smaller concentrations in the atmosphere, such as ozone and carbon dioxide. ... Carbon dioxide (CO2) 0.038%​ Water vapor (H2O) 0-4%​ Methane (CH4) trace​ Sulfur dioxide (SO2) trace​ Ozone (O3) trace​ Nitrogen oxides (NO, NO2, N20) trace​ Table 2: Variable Components. ... The early atmosphere was hardly the life-sustaining blanket of air that it is today; most geologists believe that the main constituents then were nitrogen gas and carbon dioxide, but no free oxygen. In fact, the...

• Word Count: 3528
• Approx Pages: 14
• Grade Level: High School

Planets in Our Solar System From the beginning of time man has looked to the skies from intrigue and for answers and explanations. Many objects in space have observed, such as stars, constellations, galaxies, plants and moons. These celestial objects have been looked upon as spiritual and even ...

• Word Count: 2531
• Approx Pages: 10
• Has Bibliography
• Grade Level: High School