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

Together they form a very large surface area through which oxygen and carbon dioxide can diffuse. Plants have stomata to allow carbon dioxide to enter the leaf for photosynthesis. Unfortunately for the plant, if stomata are open to allow carbon dioxide into the leaf, they will also allow water vapour to leave. ...

• Word Count: 2635
• Approx Pages: 11
• Grade Level: High School

Fresh water is an important resource connected to the environment and society. Water is a critical component of ecological cycles. Aquatic ecosystems harbor diverse species and offer many valuable services. People require water to run industries, for energy, and to grow food. Due to the importance o...

• Word Count: 2614
• Approx Pages: 10
• Has Bibliography
• Grade Level: Undergraduate

Introduction In this report I am going to discuss the adaptations of 3 plants groups: xerophytes, hydrophytes and mesophytes relating to plant water balance and I will discuss how these adaptations allow the plant to survive in it's ecological niche. An ecological niche can be defined as the way of ...

• Word Count: 2711
• Approx Pages: 11
• Has Bibliography
• Grade Level: Undergraduate