Cold fronts occur when heavy cold air displaces lighter warm air, pushing it upward. Cumulus clouds are the most common cloud types that are produced by cold fronts. They often grow into cumulonimbus clouds, which produce thunderstorms. Cold fronts can also produce nimbostratus, stratocumulus, and stratus clouds.
Loose leaf. A loose leaf is a piece of paper that is not bound in place, but typically punched so as to be organized in a ring binder. Loose leaves may be sold as free sheets, or made up into notepads, where perforations allow them to be removed easily. Contents.
Loose leaf lettuce actually covers a variety of lettuce leaves and is defined as lettuce leaves that donât form heads as they grow. Loose leaf lettuce is a great plant for home-growers as the leaves can be frequently picked without halting the growth of the rest of the plant. Butter lettuce, including Bibb and Boston lettuces, are mild green on the outer leaves, yellow-green on the inside, and have a soft, velvety or âbutteryâ texture.