(20-2) Flashcards
What is a boundary between two air masses?
It’s called a front, where two air masses meet, and winds happen as air moves from high to low pressure.
Why are cold air masses denser than warm air masses?
Cold air masses are denser because the air particles are closer together, while warm air is less dense.
What happens when a cold air masses lifts a warm air mass
The cold air lifts the warm air at an angle, causing clouds and weather changes.
What is a warm front?
A warm front happens when warm air slides over cold air. It moves slowly, bringing light rain for days and clouds like cirrus, cirrostratus and nimbostratus
What are stationary fronts.
Stationary fronts happen when two air masses meet but don’t move. They bring light winds and light to moderate rain.
What is a cold front.
A cold front forms when cold air pushes under warm air. It moves fast, causing thunderstorms and rain, followed by cooler, drier weather.
What are occluded fronts?
Occluded fronts happens when a cold front overtakes a warm front, causing heavy rains and strong winds at first, then light rain
How do cyclones form?
Cyclones form when warm air rises in a low-pressure area. This creates clouds, rains, and thunderstorms, and the air swirls counterclockwise in the northern hemisphere.
What is the Coriolis effect.
The Coriolis effect makes air in cyclones swirl counterclockwise in the northern hemisphere.
How do cyclones change over time
As a cyclones moves, it can lose energy, and the storm weakens. The pressure flows from low to high pressure, causing weather changes.
What is an anticyclone?
An anticyclone is a high-pressure system where air sinks, warms up, and brings sunny, dry weather.
How are cyclones and anticyclones connected?
Air from anticyclones moves into cyclones, helping them form and change.
