Air __________ in a low-pressure system to the upper atmosphere. It cools and flows to the __________ pressure area and __________ to the Earth's surface. It warms, then flows across the Earth's surface to the __________ pressure system.
Air rises in a low-pressure system to the upper atmosphere. It cools and flows to the high pressure area and sinks to the Earth's surface. It warms, then flows across the Earth's surface to the low pressure system.
