The most abundant gas on the earth’s atmosphere is
What atmospheric layer has most of the clouds?
An altitude of 100 kilometres (62 mi; 330,000 ft.) above the Earth’s sea level marks the beginning of space where human travelers are considered astronauts. What is it called?
The study of weather is called?
A millimetre of mercury is a manometric unit of pressure, defined as precisely 133.322387415 pascals. What is the symbol for a millimetre of mercury?
What is the average atmospheric pressure at sea level as defined by the International Standard Atmosphere?
What is the instrument used to detect earthquakes?