The atmosphere:
- contains the air that we breathe
- helps retain the sun’s heat and prevents it from escaping back into space
- protects life from harmful radiation from the sun
- plays a major role in Earth’s water cycle
- helps keep the climate on Earth moderate
What is atmosphere?
“Atmosphere is a protective layer of gases that shelters all life on Earth, keeping temperatures within a relatively small range and blocking out harmful rays of sunlight.” Features of the Atmosphere: Helps retain the sun’s heat and prevents it from escaping back into space. Protects life from harmful radiation from the sun.
What is the atmospheric pressure at 30 kilometers up in atmosphere?
23/01/2020 · Atmosphere refers to the gases surrounding a star or planetary body held in place by gravity. The composition of the Earth's atmosphere is about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, with water vapor, carbon dioxide, and other gases. The atmospheres of other planets have a different composition.
What is the Earth's atmosphere made of?
The atmosphere is a thin blanket of air that surrounds the earth. It provides us with the air we breathe and protects us from the harmful effects of the sun’s rays. The atmosphere extends up to a height of about 1,600 km. The atmosphere is divided into five layers based on composition, temperature, and other properties.
What are the different layers of the atmosphere?
An atmosphere is a layer or a set of layers of gases surrounding a planet. An atmosphere is more likely to be retained if the gravity it is subject to is high and the temperature of the atmosphere is low. The atmosphere can be divided into layers based on its temperature. These layers are the troposphere, the stratosphere, the mesosphere and the ...
What is atmosphere short define?
1 : the whole mass of air that surrounds the Earth Experts have noticed changes in the atmosphere. Meteoroids burn up as they pass through Earth's atmosphere. 2 : a mass of gases that surround a planet or star The planets have different atmospheres. 3 : the air in a particular place or area.
What is atmosphere short answer Class 4?
What is atmosphere short answer Class 4? An atmosphere contains the air that we breathe and is a blanket of gases that surrounds Earth. It is held near the surface of the planet by Earth's gravitational attraction.20-Dec-2021
What is atmosphere Class 3?
Thick envelop of air around the earth is called atmosphere. Air is a mixture of many gases like oxygen, nitrogen, carbon dioxide, argon etc. ... We inhale oxygen from air. Atmosphere contains 21% oxygen, 78% nitrogen and 1% other gases.
What is atmosphere called?
The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth's surface is called the exosphere.
What is atmosphere class6?
Answer: Atmosphere is a blanket of air surrounding the Earth's surface. Atmosphere contains oxygen which is essential for animals to breathe and get energy from food.
What is atmosphere Class 7 short?
(i) What is the atmosphere? Answer: The blanket of air surrounding the earth is called the atmosphere. The atmosphere primarily comprises nitrogen and oxygen in bulk and other gases like carbon dioxide, helium, ozone, etc in lesser quantities. All living beings on earth depend on the atmosphere for their survival.
What is atmosphere Class 9?
Ans: Atmosphere is the veil of odourless,tasteless and colourless gases,dust particles and water vapour surrounding the earth which forms a protective boundary between the outer space and the biosphere. It is composed of different gases in different volumes.
What is a atmosphere in Kid definition?
The atmosphere. is the layer of gas that surrounds Earth. It is often called air. Other planets, and some of their larger moons, also have atmospheres. The atmosphere consists of several different gases.
What is atmosphere Class 5?
An atmosphere contains the air that we breathe and is a blanket of gases that surrounds Earth. It is held near the surface of the planet by Earth's gravitational attraction. A barometer is used to measure air pressure.24-Sept-2020
What is atmosphere Class 8?
The layer of air above the earth is called atmosphere. The air in our atmosphere extends upto 300 kilometres above the surface of Earth. The atmosphere contains a tremendous amount of air. Air has weight so the atmosphere consisting of tremendous amount of air has enormous weight.04-May-2020
What is atmosphere in biology?
The atmosphere is the layer of air that surrounds the Earth and is comprised mainly of Nitrogen and Oxygen. The atmosphere also contains traces of gases like carbon dioxide, neon, helium, etc.
What is atmosphere and its importance?
The atmosphere is a mixture of nitrogen (78%), oxygen (21%), and other gases (1%) that surrounds Earth. ... It blocks some of the Sun's dangerous rays from reaching Earth. It traps heat, making Earth a comfortable temperature. And the oxygen within our atmosphere is essential for life.
What is the greenhouse effect?
The process of gases in the Earth’s atmosphere trapping the Sun’s heat is known as the greenhouse effect. Due to this process, the Earth is much wa...
Where does the Earth’s atmosphere end?
The earth’s atmosphere doesn’t end at a specific place. The higher we go, the thinner the atmosphere gets. There is no clear distinction between th...
Why do passenger jet planes and commercial aeroplanes prefer flying in the Stratosphere?
The jet planes fly in the lower stratosphere because of less turbulence in the stratosphere leading to a smooth ride. Planes usually flow near the...
Why do passenger jet planes and commercial aeroplanes prefer flying in the Stratosphere?
The jet planes fly in the lower stratosphere because of less turbulence in the stratosphere leading to a smooth ride. Planes usually flow near the...
Which layer of the atmosphere contains the ozone layer?
The stratosphere contains the ozone layer. The stratospheric ozone layer absorbs most of the sun’s ultraviolet light and thereby protects the earth.
Which instrument is used to measure the air pressure?
A barometer is used to measure air pressure.
What is the most important element in the atmosphere?
While oxygen is important for most animals to survive, it is nitrogen that makes up most of the atmosphere. The composition of the atmosphere is broken down as: 1 78% nitrogen 2 21% oxygen 3 0.9% argon 4 <0.1% other gases
What happens to the temperature of the troposphere as the altitude increases?
As altitude increases in the troposphere, the temperature decreases. Much of the lower layer is heated up by the heat of Earth's surface. The rising hot air can, and often does, cause turbulence throughout the troposphere.
How far above the surface is the stratosphere?
The beginning of the stratosphere varies around the earth due the difference in centripetal force from rotating. Near the poles, the stratosphere begins 5 miles above the surface, while down at the equator, it starts higher up at 10 miles (8 and 16 km).
Which layer of the atmosphere absorbs the sun's ultraviolet rays?
It's in the stratosphere that three oxygen atoms combine to form the ozone layer. The ozone layer absorbs most of the sun's ultraviolet rays (which are harmful to us) which heat up the stratosphere. The stratosphere is a very stable layer, and not much weather occurs in it.
Where do meteors burn up?
Most of the meteors that burn up in the atmosphere do so in the mesosphere. So if your next shooting star wish comes true, you can thank the mesosphere for helping. Above the mesosphere is the thermosphere, which extends from 53 - 621 miles (90 - 1,000 km) up into the atmosphere.
What causes the temperature of the thermosphere to rise?
Direct heat from the sun causes the temperature of the thermosphere to rise sharply. Temperatures here can get up to 932° F (500° C), and yet, even with these temperatures, most satellites, including the International Space Station, orbit in the thermosphere.
How much pressure is in an atmosphere?
One atmospheric pressure (1 atm) is equal to 14.7 pounds per square inch (psi). The atmospheric pressure drops to almost zero when you reach 30 kilometers up in the atmosphere. Our atmosphere is the layers of gases surrounding the earth.
