What are the characteristics of atmosphere Class 9?

Answer: The atmosphere protects the earth from harmful ultraviolet and infrared rays of the sun. It has oxygen and nitrogen, the life sustaining gases. It helps in retaining the necessary warmth on the earth and helps in the circulation of water vapour as the source of rainfall.

What are the main characteristics of each layer of atmosphere?

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  • Troposphere. This is the lowest layer of the atmosphere containing clouds, snow, rain. …
  • Stratosphere. It contains most of the ozone in the atmosphere. …
  • Mesosphere. …
  • Thermosphere and ionosphere. …
  • Exosphere. …
  • Magnetosphere.

What are the main characteristics of the five layers of atmosphere?

The different layers of the atmosphere. The atmosphere can be divided into layers based on its temperature, as shown in the figure below. These layers are the troposphere, the stratosphere, the mesosphere and the thermosphere. A further region, beginning about 500 km above the Earth’s surface, is called the exosphere.

What is atmosphere 1 marks answer?

Atmosphere is the envelope of gases surrounding the Earth.

What is the characteristics of atmosphere?

Earth’s atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases. These gases are found in layers (troposphere, stratosphere, mesosphere, thermosphere, and exosphere) defined by unique features such as temperature and pressure.

What are the 4 characteristics of troposphere?

Of all five layers, the troposphere has the highest density, greatest air pressure, 75% of the atmospheric mass, nearly all water vapor, and a temperature range from 62 to -60 degrees F. The temperature in the troposphere decreases steadily with altitude.

What is atmosphere made of?

It’s a mixture of different gases. The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of other gases, too, such as carbon dioxide, neon, and hydrogen.

What is importance of atmosphere?

Not only does it contain the oxygen we need to live, but it also protects us from harmful ultraviolet solar radiation. It creates the pressure without which liquid water couldn’t exist on our planet’s surface. And it warms our planet and keeps temperatures habitable for our living Earth.

What are examples of atmosphere?

Atmosphere is defined as the area of air and gas enveloping objects in space, like stars and planets, or the air around any location. An example of atmosphere is the ozone and other layers which make up the Earth’s sky as we see it. An example of atmosphere is the air and gases contained inside a greenhouse.

What is the characteristics of stratosphere?

The stratosphere is very dry air and contains little water vapor. Because of this, few clouds are found in this layer and almost all clouds occur in the lower, more humid troposphere. Polar stratospheric clouds (PSCs) are the exception. PSCs appear in the lower stratosphere near the poles in winter.

What is the characteristics of mesosphere?

In the mesosphere, temperature decreases as altitude increases. This characteristic is used to define its limits: it begins at the top of the stratosphere (sometimes called the stratopause), and ends at the mesopause, which is the coldest part of Earth’s atmosphere, with temperatures below −143 °C (−225 °F; 130 K).

What are the properties of the troposphere and ionosphere?

Troposphere: It is the first layer of the atmosphere. It is the layer were living and non-living things interact with each other(biosphere). Ionosphere: Ionosphere layer present in the Thermosphere helps in radio transmission.

What are the 7 atmosphere layers?

Layers of Earth’s Atmosphere
  • Troposphere. The troposphere is the lowest layer of our atmosphere. …
  • Stratosphere. The next layer up is called the stratosphere. …
  • Mesosphere. Above the stratosphere is the mesosphere. …
  • Thermosphere. The layer of very rare air above the mesosphere is called the thermosphere. …
  • Exosphere. …
  • Ionosphere.

What is characteristic of the thermosphere?

The thermosphere is the atmospheric region from ∼85 to ∼500 km altitude, containing the ionosphere. It is characterized by high temperature and large variability, in response to changes in solar ultraviolet radiation and solar-driven geomagnetic activity.

What is the characteristic of exosphere?

The exosphere has gases like hydrogen and helium, but they are very spread out. There is a lot of empty space in between. There is no air to breathe, and it’s very cold.