Layers of the Atmosphere

Front

What is the outermost layer of the atmosphere?

Back

Exosphere

Answer explanation

The outermost layer of the atmosphere is the Exosphere. It is where the atmosphere transitions into outer space, lying above the Thermosphere and characterized by extremely thin air.

Front

Which layer of the atmosphere is known for reflecting radio waves back to Earth?

Back

Mesosphere

Answer explanation

The mesosphere is the layer of the atmosphere that reflects radio waves back to Earth, making it crucial for radio communication. The other layers do not have this reflective property.

Front

How does the stratosphere protect living things from harmful radiation?

Back

absorbing ultraviolet radiation

Answer explanation

The stratosphere absorbs ultraviolet radiation, which protects living organisms from its harmful effects. This is crucial for maintaining life on Earth, as UV radiation can cause skin cancer and other health issues.

Front

Why is the troposphere significant in terms of weather?

Back

It is where most weather phenomena occur.

Answer explanation

The troposphere is significant for weather because it is where most weather phenomena occur, including clouds, rain, and storms, making it the layer of the atmosphere directly involved in our daily weather.

Front

What is the composition of the atmosphere in terms of gases?

Back

78% Nitrogen, 21% Oxygen, 0.9% Argon, 0.1% Other

Answer explanation

The atmosphere is primarily composed of 78% Nitrogen and 21% Oxygen, with Argon at 0.9% and other gases making up 0.1%. This matches the correct choice, highlighting the accurate proportions of these gases.

Front

In which layer do satellites orbit?

Back

Exosphere

Answer explanation

Satellites orbit in the exosphere, the outermost layer of Earth's atmosphere, where they can maintain stable orbits due to minimal atmospheric drag.

Front

Which layer of the atmosphere is known for reflecting radio waves back to Earth?

Back

Mesosphere

Answer explanation

The mesosphere is the layer of the atmosphere that reflects radio waves back to Earth, making it crucial for radio communication. The other layers do not have this reflective property.

Front

What is the coldest layer of the atmosphere?

Back

Mesosphere

Answer explanation

The mesosphere is the coldest layer of the atmosphere, with temperatures decreasing with altitude, reaching as low as -90°C. In contrast, the troposphere and stratosphere are warmer, while the thermosphere is much hotter.

Front

Where do meteors burn up in the atmosphere?

Back

Mesosphere

Answer explanation

Meteors burn up in the mesosphere, which is located about 50 to 85 kilometers above the Earth's surface. This layer is where the friction from the atmosphere causes meteors to ignite and disintegrate.

Front

Which layer of the atmosphere is nearest to Earth?

Back

Troposphere

Answer explanation

The troposphere is the lowest layer of Earth's atmosphere, where weather occurs and where we live. It extends from the surface up to about 8-15 kilometers, making it the layer closest to Earth.