Which of the following is NOT a category for determining a cloud's altitude.

This phrase means "rain."

This phrase means "curl."

This phrase means "stretched."

This phrase is referred to as "puffy" or "fluffy."

The prefix used for clouds that are in the middle of the sky.

The prefix used for clouds that are high in the sky.

The proper name for a "jet trail."

Middle of the sky.

High in the sky.

Low level, no rain.

Low level, rain.

Low level extending vertically. Better prepare for a storm!

Low level and "puffy."

Middle of the sky and stretched.

High in the sky and stretched.

High in the sky.

Stretched and rounded, low level.

The formation of a solid structure whose atoms or molecules are arranged in a repeating, three-dimensional pattern.