Question

Q 4) Explain the following terms 1. Air 2. Atmosphere 3. Troposphere 4. Mesosphere 5. Stratosphere 6. Greenhouse effect. pls ans fast it urgent​

Answer 1

1) Air = the mixture of gases that surrounds the earth and that people, animals and plants breathe

2) Atmosphere = The atmosphere of Earth, commonly known as air, is the layer of gases retained by Earth's gravity that surrounds the planet and forms its planetary atmosphere.

3) Troposphere = the lowest layer of Earth's atmosphere. Most of the mass (about 75-80%) of the atmosphere is in the troposphere.

4) Mesosphere = The mesosphere is directly above the stratosphere and below the thermosphere. It extends from about 50 to 85 km (31 to 53 miles) above our planet.

5) Stratosphere = It is the second layer of the atmosphere as you go upward. The troposphere, the lowest layer, is right below the stratosphere. ... The top of the stratosphere occurs at an altitude of 50 km (31 miles).

6) Greenhouse effect = a natural process that warms the Earth's surface. ... Greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide, ozone and some artificial chemicals such as chlorofluorocarbons (CFCs).

Answer 2

Answer:

air:

Air is a mixture of many gases and tiny dust particles. It is the clear gas in which living things live and breathe. It has an indefinite shape and volume. It has mass and weight, because it is matter. The weight of air creates atmospheric pressure.

atmosphere:

atmosphere is the layers of gases surrounding a planet or other celestial body. Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases.

troposphere:

The troposphere is the lowest layer of Earth's atmosphere. Most of the mass (about 75-80%) of the atmosphere is in the troposphere. Most types of clouds are found in the troposphere, and almost all weather occurs within this layer.

mesosphere:

The mesosphere is a layer of Earth's atmosphere. The mesosphere is directly above the stratosphere and below the thermosphere. It extends from about 50 to 85 km (31 to 53 miles) above our planet. Temperature decreases with height throughout the mesosphere. ... Most meteors vaporize in the mesosphere.

stratosphere:

The stratosphere is a layer of Earth's atmosphere. It is the second layer of the atmosphere as you go upward. The troposphere, the lowest layer, is right below the stratosphere. The next higher layer above the stratosphere is the mesosphere. ... The top of the stratosphere occurs at an altitude of 50 km (31 miles).

greenhouse effect:

The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. ... The absorbed energy warms the atmosphere and the surface of the Earth.