What are the different layers of clouds in the Earth's atmosphere?

The different layers of clouds in the Earth's atmosphere are classified into three main types: high clouds, middle clouds, and low clouds. High clouds are found at altitudes of 20,000 to 40,000 feet and include cirrus, cirrostratus, and cirrocumulus clouds. Middle clouds are located between 6,500 to 20,000 feet and consist of altocumulus and altostratus clouds. Low clouds are found below 6,500 feet and include stratus, stratocumulus, and nimbostratus clouds.