2. There is a point in history that is referred to as the "Cambrian explosion" (which appropriately occurred during the Cambrian period and marked the beginning of the
Phanerozoic Eon). Consider the video carefully. Why might they call it that??
I

Altocumulus, altostratus, cirrocumuls, cirrostratus, cirrus, cumulonimbus, cumulus, nimbostratus, stratocumulus, stratus 8.) clouds with tallest vertical development 9.) low altitude clouds in solid layers that produce rain 10.) high altitude thin flat layers of clouds 11.) rain clouds that form under stable atmospheric conditions 12.) middle altitude clouds with globular appearance