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What is the atmosphere of Earth made of? Earth's atmosphere is 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide with very small percentages of other elements. Our atmosphere also contains water vapor. In addition, Earth's atmosphere contains traces of dust particles, pollen, plant grains and other solid particles.  100 km (62 mi) 690 km (430 mi) 1.What is the most abundant element in the earth's atmosphere? Argon. Carbon dioxide. Neon. Nitrogen. Oxygen. 2.What is the correct order of earth's atmospheric layers from bottom to top? Stratosphere, Mesosphere, Troposphere, Thermosphere, Exosphere. Stratosphere, Troposphere, Mesosphere, Thermosphere, Exosphere. Stratosphere, Troposphere, Thermosphere, Mesosphere, Exosphere. Troposphere, Mesosphere, Stratosphere, Thermosphere, Exosphere. Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere. 3.Which layer of the atmosphere has the highest density of gas molecules? Exosphere. Mesosphere. Stratosphere. Thermosphere. Troposphere. 4.Which layer of the atmosphere contains the ozone layer? Exosphere. Mesosphere. Stratosphere. Thermosphere. Troposphere. 5.In which layer do virtually all weather phenomena take place? Exosphere. Mesosphere. Stratosphere. Thermosphere. Troposphere. 6.In which layer do auroras (e.g. northern lights) occur? Exosphere. Mesosphere. Stratosphere. Thermosphere. Troposphere. 7.Which two atmospheric layers have temperature profiles that promote convection? Mesosphere and Stratosphere. Mesosphere and Thermosphere. Mesosphere and Troposphere. Stratosphere and Thermosphere. Stratosphere and Troposphere. 8.What frequencies of electromagnetic radiation are absorbed by the earth's ozone layer? Infrared light. Microwaves. Radio waves. Ultraviolet light. Visible light. 9.What frequencies of electromagnetic radiation are most abundantly emitted by the sun? Infrared light. Microwaves. Radio waves. Ultraviolet light. Visible light. 10.What frequencies of electromagnetic radiation are most abundantly emitted by the earth? Infrared light. Microwaves. Radio waves. Ultraviolet light. Visible light. 11.What frequencies of electromagnetic radiation are absorbed by gasses in the troposphere? Infrared light. Microwaves. Radio waves. Ultraviolet light. Visible light. 12.What instrument is used to measure air pressure? Barometer. Radiosonde. Seismograph. Thermometer. Volt meter. Correct: 1.Nitrogen makes up 78% of the earth's atmosphere. 2.Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere. 3.Troposphere. 4.Stratosphere. 5.Troposphere. 6.Thermosphere. 7.Mesosphere and Troposphere. 8.Ultraviolet light. 9.Visible light. 10.Infrared light. 11.Visible light passes freely through the troposphere. 12.A barometer measures barometric (atmospheric) pressure. |
| The Atmosphere |
| The Atmosphere |
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What is EXOSPHERE?
The exosphere is the uppermost layer of Earth's atmosphere. In the exosphere, an upward travelling molecule moving fast enough to attain escape velocity can escape to space with a low chance of collisions; if it is moving below escape velocity it will be prevented from escaping from the celestial body by gravity. In either case, such a molecule is unlikely to collide with another molecule due to the exosphere's low density. The main gas within the Earth's exosphere are the lightest gases, mainly hydrogen with some helium, carbon dioxide, and atomic oxygen near the exobase. The exosphere is a transitional zone between Earth’s atmosphere and interplanetary space. |