Atmosphere

Neptune's atmosphere is mostly made up of hydrogen and helium.

It has no atmosphere.

It transports some substance through the atmosphere as in a dust storm, blizzard, sandstorm, etc.

Mars is a terrestrial planet with a thin atmosphere, having surface features like those of the impact craters of the Moon, and valleys, deserts, and polar ice caps of Earth.

Snow forms when water vapor in the atmosphere freezes into ice crystals.

Snowflakes nucleate around particles in the atmosphere by attracting supercooled water droplets, which freeze in hexagonal-shaped crystals.

The landscape, culture and food all amalgamate into the unique atmosphere and feeling of Barcelona.

Venus' atmosphere (air) is mostly carbon dioxide with clouds of sulphuric acid.

All the carbon dioxide in the atmosphere acts like a blanket, trapping heat from the Sun.