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D - Science - Unit 7
Study Guide for Weather Formative - Air Masses & Fronts - Part 2
| Question | Answer |
|---|---|
| What are cyclones? | swirling centers of LOW air pressure |
| Which way do cyclone wind spin in the Northern Hemisphere? | counterclockwise, inward toward the center of low pressure |
| What are cyclones and decreasing air pressure associated with? | clouds, wind, and precipitation |
| Where does air want to move? | from high to low pressure |
| What are anticyclones? | HIGH pressure centers of dry air |
| As the warm air at the center of the low rises what happens to its pressure? | it decreases |
| How do winds spiral in an anticyclone? | spirals outward from the center it, moving towards an area of low pressure |
| Because of the Coriolis Effect winds in an anticyclone spin which way in the Northern Hemisphere? | clockwise |
| In an anticyclone, what happens to the temperature of the air as the relative humidity decreases? | it cools off |
| In an anticyclone, what type of weather do you see as the cool air falls? | clear and dry |
| What type of weather is associated with High Pressure in the summer? | extended periods of dry, sunny days; in the extreme situations it can lead to heatwaves and droughts (also poor air quality and high pollen counts) |
| What type of weather is associated with High Pressure in the winter? | cold, dry days with light winds; stratocumulus clouds can form leading to several days without sun, leading to lower temperatures; frost, light snow |
| What type of weather is associated with Low Pressure in the summer? | periods of prolonged rainfall, which, in the extreme, can lead to flooding; thunderstorms are also common |
| What type of weather is associated with Low Pressure in the winter? | stormy or wintery weather, heavy rain or snowfall; possible flooding |
| Why is the weather associated with High Pressure like that? | air masses tend to be cooler, drier, and denser |
| Why is the weather associated with Low Pressure like that? | air masses tend to be warmer, more humid, and less dense |
| Why does cool/cold air hold less water vapor? | its particles are packed more tightly together |
| Why does warm air hold more water vapor? | its particles are more spread out |
Created by:
lprinke
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