Which type of cloud is thin and wispy, found at high altitudes and composed of ice crystals?

What is the term for the outermost layer of a star's atmosphere, visible during a total solar eclipse as a halo of light?

Which star, known as the North Star, is often used in navigation due to its proximity to the celestial north pole?

What is the name for the process by which water from the surface of the Earth enters the atmosphere as water vapor?

What is the name for a large, bowl-shaped depression in the Earth's surface, often caused by the impact of a meteorite?

In the human respiratory system, what structure prevents food from entering the trachea during swallowing?

According to the law of conservation of momentum, what happens to the total momentum of a system of objects if no external force acts on it?

What is the main function of the kidneys in the human body?

In which medium does sound travel fastest?

What is the term for the process by which sedimentary rocks are formed from the accumulation and compaction of plant and animal remains?