The atmosphere is a mixture of gases. The atmosphere is mostly nitrogen (approximately 80%) and oxygen (approximately 20%). The remaining gases are found in much smaller proportions, such as ...

These elements influence perception ... using it as a fundamental design tool to create atmosphere and meaning. From the ancient temples of Egypt and Greece to modernist masterpieces, light ...

There are 118 known elements. 94 occur naturally on Earth ... gas which has no smell Found in air – 78 % of Earth's atmosphere is made up of nitrogen. Fertilizers, ammonia and nylon oxygen ...

It is widely believed that Earth's atmosphere has been rich in oxygen ... The occurrences are inferred from concentrations of elements sensitive to atmospheric oxygen levels in the geologic ...